WEBVTT captioned by amine, checked by sachac

NOTE Introduction

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[Lukas]: Welcome to our presentation,

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Collaborative Data Processing

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and Documenting using org-babel.

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My name is Lukas Bossert, and I'm

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from the RWTH Aachen University

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in the city of Aachen, Germany.

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[Jonathan]: And my name is Jonathan Hartmann.

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I'm also from the IT Center here at RWTH Aachen.

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[Lukas]: Great.

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And we will show you today how you

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can use Org Mode for data processing.

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So you see a little workflow what we are going to do.

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First, we will give you a slight introduction to Org Mode.

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Then we will dive into the part of data preparing.

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First, you're going to query the data using the language SPARQL.

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Then we're going to clean it using a different language.

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And in the main part of our presentation,

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we're going to do the data processing, first aggregating

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using Python, later on counting items using Org,

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and even visualizing it using R. At the end,

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we're going to show you how to preserve

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the data and the document and its documentation,

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first doing in plain exporting, then adding some metadata,

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and showing you two different ways, first a manual export,

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and also then a batch-processed export.

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All right.

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Let's dive in to that.

NOTE Org Mode

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Jonathan, can you give us an introduction about Org Mode?

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[Jonathan]: Of course.

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So in case anyone isn't familiar with it,

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Org Mode, in the words of Carsten Dominik,

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is back to the future for plain text.

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So this is just a module available for Emacs,

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plain-text base.

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It's been around since 2003, which

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makes it about 20 years old.

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And it's extensible and fully customizable.

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And especially, it's very convenient, very good

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for scientific text production and organization.

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So for example, you can do project management, agenda,

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diary, journaling, personal knowledge management,

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presentation.

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Even this is written in Org Mode.

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It's an Org Mode presentation.

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You can do single source publishing,

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which we will do later on, and also

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literate programming, which is the core of our talk.

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OK.

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[Lukas]: So let me stop this presentation here.

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So what you see here is the plain text underneath it.

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So this is Org Mode.

NOTE Working together

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And Jonathan, since we kind of already

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did the introduction together, should we

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also do the working part together?

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[Jonathan]: Of course.

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So you see on the screen there on the right,

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that's my screen in Emacs.

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And Lukas, why don't you host a session using CRDT,

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and I'll connect to your buffer.

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[Lukas]: OK. Great.

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I do that.

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So what I do, I'm using Doom Emacs.

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And I can use the `SPC` and then the `l`

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for the live share/collab part.

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I can use the `s` for share current buffer.

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So when I do this, I'm getting asked for some settings.

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I'm going with the default settings here.

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So default port, no password, and my display name.

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And now Emacs is connecting.

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And once it's connected, which just takes a couple of seconds,

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I can get the URL.

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So I'm going back to this menu and using `y`

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for copying the URL of the current session.

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And this is the URL I'm going to send over to you, Jonathan,

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to pick that up.

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[Jonathan]: Right.

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OK.

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And now on my screen, I'm going to do a `SPC l c` for connect.

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And I'm going to paste the URL

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that Lukas just sent me in here.

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Default port, no password.

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And we're connecting now.

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So this takes a second just to get us synced up.

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So we can work on the same document at the same time.

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We can follow each other's cursors around.

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We can have multiple buffers open and work on them

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at the same time.

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And so here you see that we are both in the same document.

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You can see my cursor popping around.

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And you can see we're both editing the same item.

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Great.

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[Lukas]: So we also see who else is currently in our buffer

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with the user overview.

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So let me just delete that window.

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And that's going to work in our main one.

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So we said first part is about data retrieval.

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So we should give it a headline.

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We said prepare stage.

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So what are we going to do first, Jonathan?

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[Jonathan]: So what we're going to do,

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what this whole document is based upon,

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is we're going to pull data from Wikidata using a SPARQL query.

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The data we're going to pull is related to the NFDIs,

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which here in Germany is the National Forschungsdaten

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Infrastructure, which is a sort of collection of universities

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that work together on various research projects.

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And this is emblematic of the kind of data

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that we would be interested in working with here.

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So I'm going to paste a--forgive the pre-written code--

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I'm going to paste some text in here.

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[Lukas]: And while you are talking, I just

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keep on documenting what we do

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so we can split the work.

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[Jonathan]: In here, after a minor technical upset,

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is the raw dataset cell.

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And it's going to use SPARQL,

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which is how we have the syntax highlighting

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in our code here.

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It's going to go to the URL endpoint

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query.wikidata.org/sparql ,

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and it's going to return the data as a text CSV,

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and it's going to cache that data

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so that we don't constantly hammer the API every time

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we run this notebook.

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So I'm going to run that there.

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You can see down at the bottom of my screen,

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we're contacting the host query.wikidata.org .

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[Lukas]: And there's the result.

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[Jonathan]: Yeah, except I think that for our purposes here,

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we're just going to limit this to 50 results.

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[Lukas]: Oh, yeah.

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[Jonathan]: Just so it's a little easier for us to manage.

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I'm going to run that again.

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There we go.

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That looks a little better.

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[Lukas]: I think that's fine.

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50 items is fine.

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So what do we see here, Jonathan?

NOTE Data cleaning

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[Jonathan]: Right.

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So the first thing we see when we look at this

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is a couple of Q codes at the top,

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which are an artifact of Wikidata.

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So these are pages which don't have

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the label for whichever institution they happen to be.

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For our purposes here, we're just going to exclude them.

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We could just go on Wikidata and edit them ourselves.

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But for now, it's a little more interesting

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if we go and remove them.

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So I'm going to create a new cell.

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Lukas, if you don't mind starting one for data cleaning.

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[Lukas]: Oh, yeah.

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Good point.

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Yeah, data cleaning.

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OK.

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How do you want to do that, Jonathan?

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[Jonathan]: I'm going to use a shell command.

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So let's see.

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There we go.

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And so you can see, here is another cell,

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that the cell is now using a shell,

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and that we have this thing `:var input=raw-dataset`,

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which is the name of the cell above

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where we got our data from Wikidata.

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This is going to run just a simple shell command.

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It's going to take the input and then run `sed` on it

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and exclude any records which have a Q

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followed by one or more digits afterwards.

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That should remove those from our data set.

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So I'm going to run that.

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That seems to have done the trick.

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[Lukas]: Great, yeah.

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That's really good.

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We got rid of all the Q items.

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Very good.

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So we just have two-column table: institutions

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and consortia.

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Very nice.

NOTE Processing

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So let's come to our main part, doing some processing.

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Let me give you a headline here, process the data.

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What do you want to do first?

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[Jonathan]: This is not a very complicated data set,

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but let's just do some simple counts first.

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I'm going to start with Python,

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and we're just going to do some aggregation with Python.

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Again, I've got some pre-written code here.

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You can see that we've started a cell using Python.

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The variable `clean_df` now is equal to `clean-dataset`.

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So we're going to take that data

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that we retrieved from the SPARQL query,

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we're going to run it through the cleaning cell,

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and then we're going to import it into this cell.

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This is just going to do some simple Python aggregation.

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We're going to import `pandas`,

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which is the Python data science library,

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create a data frame out of our input,

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and then aggregate it, grouping on `wLabel`,

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and getting a count from that and returning it.

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So if we execute that cell...

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[Lukas]: Nice, we get institutions and a count.

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But what about not ordering it by the alphabet,

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but more like ordering by counts?

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[Jonathan]: Sure.

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So let's do this... `sort_values()`, I think, as the Python.

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How does that look?

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[Lukas]: Better, but I would like to

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have the highest number first

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and then ascending.

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Well, not ascending, descending.

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[Jonathan]: Right, so we can do `ascending=False`.

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[Lukas]: This is perfect, I'd say.

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[Jonathan]: Great.

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[Lukas]: Very good.

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OK, that's nice.

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We get a good overview here.

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But can we also do something else,

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like counting how many institutions are

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involved in one consortium?

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And also using this later on in the text?

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[Jonathan]: Sure, so I'm going to put a new...

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If you give me another heading down here

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for institutions per consortium...

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And here we're going to use awk code just to spice things up

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and add yet another language in here.

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So you can see this is awk.

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We're using standard in instead of defining a variable.

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But the really interesting thing about this cell

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is that we have this `:var consortium="NFDI4Memory"`.

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And what this code is doing is

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it's counting any time it sees

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that particular consortium name

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and keeping track of that.

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So if we execute this,

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Lukas, why don't you execute this one?

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[Lukas]: OK, I'm going to enter it.

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And I get a result, NFDI4Memory,

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because this is our default value for this variable.

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And we get the count.

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So it's five institutions are involved

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in the NFDI4memory consortium.

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Great, but the very nice thing, what I think,

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is here that we can use this code snippet within our text.

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So, blended in seamlessly.

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Let me give you an example.

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I'm writing out the text.

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Now we know how many institutions are in...

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Give me an example.

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I would like to know how many institutions are

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involved in NFDI4Objects, which is a consortium.

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So I'm writing `call_` and using

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the name of this snippet here, of this cell,

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which is `inst-count(`,

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and writing my value, `NFDI4Objects`.

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As soon as I evaluate this using `C-c C-c`,

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I get the result back here.

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I can do this even for more.

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Or in writing, `call_inst-count`, go with `NFDI4Earth`,

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which is another consortium.

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`C-c C-c`, it's three institutions.

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This can be used throughout your text,

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and as soon as the data set changes from in the beginning,

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maybe different results requiring Wikidata,

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this also will be updated once it's exported.

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Very nice, Jonathan.

NOTE Visualization

12:36.040 --> 00:12:38.974
But I think we did a lot of analysis

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on text and counting things.

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Can we also do something more visual?

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Show me something.

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[Jonathan]: Sure.

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So what we can do with this, because we just

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have two columns here that are sort of related,

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we can build a little network plot out of it.

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So let's make a network visualization.

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We're going to use the `igraph` library from R

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and just plot the edges that we see here.

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There we go.

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There's my little heading and space.

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Here is our code.

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Again, just to be fancy and keep using

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different languages in here, we set a variable called

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`NFDI_edges` equal to `clean-dataset`.

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So this, again, is sort of cascading

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through the original data

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that we pulled from the Wikidata endpoint,

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cleaning that data, and now it's being inserted

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into this cell as well.

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But you see the difference here.

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Instead of exporting a table, what we're saying

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is that there will be a graphics file,

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and it will be called network-plot.png.

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All right.

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And so Lukas, why don't you execute this one?

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[Lukas]: There you go.

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I can click `C-c C-c`

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and I get a nice plot of the network below our cell.

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So this is very nice indeed.

NOTE Preserve

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So I think it's about time to wrap it up and to export

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and to preserve the data and the documentation

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that we have in our very last step, calling preserve.

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So I would like to do it in two steps.

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First, maybe manually exporting it,

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but then also doing it in a batch process.

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Giving you some insights how to do that manual export.

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For example, you can do a LaTeX export.

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Let me write down the key combination to do that here.

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So you press `SPC m e l o`.

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Let me show you how this is done.

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So I'm pressing `SPC`.

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I'm pressing `m`, which is my local leader.

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I'm pressing `e`, which is now the `org-export-dispatch`.

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And now I have different options I can choose from.

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I want to do a LaTeX export because I want to get in PDF.

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So I'm pressing `l`.

00:15:08.675 --> 00:15:11.479
Now I've got different options available.

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So I'm pressing `o` for a PDF file and open that.

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Let's see now the code.

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Now this is exporting document.

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And what we have here is PDF,

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which contains our workflow in the beginning,

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our bullet points we have here,

00:15:35.708 --> 00:15:37.919
and also the code snippet

15:37.920 --> 15:41.120
that we use for querying the data.

15:41.280 --> 15:43.599
And we have the result below that.

15:43.600 --> 15:46.999
So this is our table with all the data sets.

15:47.000 --> 15:51.879
But as you can see, this is running out of the page.

15:51.880 --> 15:55.679
So this is not very nice using the default settings.

15:55.680 --> 16:00.239
But everything is in this PDF.

16:00.240 --> 16:02.759
I guess we can now show you a way

16:02.760 --> 16:06.519
how to improve this result.

16:06.520 --> 16:07.039
[Jonathan]: Right.

16:07.040 --> 16:09.399
So we have, of course, a version of this

16:09.400 --> 00:16:10.774
that we prepared ahead of time,

00:16:10.775 --> 00:16:14.279
which is more or less identical to the one we just made,

16:14.280 --> 16:17.839
but it has a little more text, a little more explanation,

16:17.840 --> 16:20.559
a little more documentation along with the code.

16:20.560 --> 16:23.879
You can see we have some metadata up at the top,

16:23.880 --> 16:26.879
the title, the authors, a bibliography,

16:26.880 --> 16:31.679
and most importantly, the `custom-export.setup` file,

16:31.680 --> 16:36.879
which lists specifically the sort of LaTeX commands

16:36.880 --> 16:43.599
that we're using and the HTML styles that we're going to use.

16:43.600 --> 16:45.919
And then down at the bottom of this file,

16:45.920 --> 16:49.119
we have our automatic batch process.

16:49.120 --> 16:51.719
Here is one more language we're including in here.

16:51.720 --> 16:53.439
So this is Lisp.

16:53.440 --> 16:57.359
And you can see here we are exporting to HTML, ASCII,

16:57.360 --> 16:58.079
and PDF.

16:58.080 --> 17:01.359
The nice thing about this is that this is a document.

17:01.360 --> 00:17:03.307
It's a sort of document that we have a couple of

00:17:03.308 --> 00:17:08.639
that we can have running automatically and building.

17:08.640 --> 17:12.919
It will export a HTML, an ASCII file, and a PDF file

17:12.920 --> 00:17:14.674
every time it's run based off of

00:17:14.675 --> 00:17:17.319
the most recent data available on Wikidata.

17:17.320 --> 17:19.719
So it's self-documenting.

17:19.720 --> 00:17:22.440
We have, of course, our data retrieval steps,

00:17:22.441 --> 00:17:25.159
our data cleaning steps, our data preparation steps,

17:25.160 --> 17:28.359
and our preservation steps all listed at the same time.

17:28.360 --> 17:30.239
And then you can see over on the right,

17:30.240 --> 17:34.320
there's an example of the HTML file that we get out of this.

17:34.360 --> 17:37.639
We also get a very nicely formatted PDF file,

17:37.640 --> 17:39.239
which doesn't have that little issue

17:39.240 --> 17:41.719
with the overflow of the table.

17:41.720 --> 17:43.559
It's very nicely put together.

17:43.560 --> 17:46.199
And we even have an ASCII file.

17:46.200 --> 17:47.879
And I should also point out very quickly,

17:47.880 --> 17:51.799
while you have this one up, Lukas, after the awk code,

17:51.800 --> 17:56.079
you can see the text for the number of consortia,

17:56.080 --> 17:57.839
or the number of institutions per consortia

17:57.840 --> 18:00.519
is actually printed inline.

18:00.520 --> 18:01.799
[Lukas]: Yeah, you're very right.

18:01.800 --> 18:06.119
So this is what we had as code,

18:06.120 --> 18:10.719
and now this is nicely integrated into our text.

18:10.720 --> 18:15.279
So we got the consortium and number of institutions.

18:15.280 --> 18:19.199
You can't tell a difference between code and text.

18:19.200 --> 18:20.719
[Jonathan]: And those are automatically updated.

18:20.720 --> 18:23.879
So if another institution joins NFDI4Earth,

18:23.880 --> 18:26.319
then the next time this runs, we update the text right here.

18:26.320 --> 18:28.519
It's nothing we have to worry about.

18:28.520 --> 18:30.400
We just pull it directly out of Wikidata.

18:31.840 --> 18:34.679
[Lukas]: And for the sake of completeness,

18:34.680 --> 18:37.879
this is the ASCII file.

18:37.880 --> 18:39.320
That's in the export format.

18:42.760 --> 18:46.440
It contains also everything, code and data.

18:48.360 --> 18:51.680
Yeah, so this is what we wanted to show you,

18:53.240 --> 18:56.639
how to do some data processing,

18:56.640 --> 18:58.679
some collaborative work,

18:58.680 --> 19:01.119
documenting using org-babel.

19:01.120 --> 19:03.960
Thanks for listening.

19:05.720 --> 19:07.280
[Jonathan]: Thank you all, have a good day.