March 21, 2018

Examples of trivial graph format

Examples of trivial graph format. Can be imported by yED.

The simplest version is this:

one two label for edge from one to two
three four another label on the other edge
one three


This version allows you to have longer node labels: (a list of nodes followed by a list of edges, separated by #”).

one   the label for one
two   the label for two
one   two label for edge from one to two
three four another label on the other edge
one   three

(you don’t have to line up the labels as I have here, you can just have a one-space gap, but it looks nicer)


1      goal
1.1    outcome one
1.1.1  activity one
1.2    outcome two
1.2.1  activity two
1.1    1
1.1.1  1.1
1.2    1
1.2.1  1.2
tgf tech
March 20, 2018

yED graph editor

Here I’m going to make some notes about using yED graph editor for Theory of Change diagrams. I’ll add to it as I find out more.

TL;DR: Seems like a very useful tool for Theories of Change.

Online version

There’s an online version. It has plenty of functionality but you don’t seem to be able to save to a public address, so that you could for example share a link to a diagram with someone else. So the main advantage is just that you don’t have to bother to install anything, rather than that you could work or share collaboratively. (I might be wrong on this.)

Offline version

I installed the offline version for Windows. I had to install as administrator because otherwise the installation routine said I didn’t have the correct rights.

Important for Theories of Change:

Various automatic layouts, e.g. hierarchical

It allows you to put nodes inside groups, and these can be nested, and also opened & closed - good for complicated diagrams.

Supports plenty of unicode symbols and emojis (I haven’t found any which aren’t supported.)

You can import node and edge lists from xls and from trivial graph format. That’s pretty important when you’ve got a lot of text. Looking at the diagrams which people make at, lots of text is a pretty common problem - though I’m not a fan of it myself.


It’s pretty powerful.

Some features:

There is a Properties panel which allows you to change the properties of a multiple selection of nodes.

Multiple undo.

You can easily create non-standard edges.

Not implemented or I’ve not worked out how to do it:

I’ve not worked out how to make nodes auto-fit to the width of the text - you have to do this manually with tools/fit node to label

I’d like to be able to inter-operate with R. yED can write graphml and the R package igraph should be able to import it, but the import fails with warnings. Found the same complaint on StackOverflow but no solution.


I did try Lucidchart, which is free for small diagrams with up to 60 entities - but it doesn’t have groups and doesn’t seem to re-route connectors.

Comparison with my own Theorymaker apps:

For me, it’s really important to be able to put nodes inside groups, and that these can be nested. (Actually I don’t nest groups very often at all, but as Theorymaker, my Logic of Theories of Change” ;-(), allows for it, I need a graphing app which can do this too.) I couldn’t find any suitable graphing app which could do this easily, which is one reason why I started creating my drag-and-drop app at Perhaps I was wasting my time, as yED can do it, at least it can, now in 2018 ;-(

The comparison with my text-based app is more interesting. One thing yED can do is easily draw arrows to and from groups, which can’t do without a hack.

(to be continued)

March 18, 2018

An evaluation puzzle: “Freak weather”

Two NGOs prepare ships to help people stranded after a tsunami on a remote island.

NGO A is well-prepared and sets sail in time.

NGO B has barely enough equipment and leaves too late to do any good.

A freak hurricane sends ship A back to base but slings ship B miles ahead.

Ship B reaches the island and just manages to save many lives.

Ship A still manages to arrive on time but its help is no longer needed.

Which NGO was most effective? Which had the most impact? Which should be praised the most? Did NGO A fail?


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