Visualization of Graph Data

[rbecher]

Hi all,

I started to develop an extension for graph visualization based on the Graph Dracula Library, using Raphael: http://www.graphdracula.net

This seems to be an interesting topic. First of all, what is the best data representation of graph data in a relational QlikView world? Second, there are a lot of limitations using those JavaScript libs. I've tried some before (D3.js etc.) but Dracula seems to have the simplest interface for my use case.

What is your opinion?

- Ralf

[#2]

Hi Ralf, im using the Graph Dracula V2 extension and i would like to change the relation label font size. Is that possible?

Thank you!

[rbecher]

Hi Gabriel,

you can change font-size in property label-style in script.js line 143:

"label-style": { "font-size": 12 }

- Ralf

[rbecher]

Hi Vinay,

I guess not. The website graphdracula.net says:

"The code is released under the MIT license, so commercial use is not a problem."

The extensions I created and published here (and on GitHub) are free of use as long as there is no special license file stating anything else.

- Ralf

[#5]

Thank you very much! That's exactly what I needed.

[Anonymous]

Hi Ralf,

I need help with my extension cloudmade. Sorry to response in this msg, but i can't send a private msg for you.

So, my question is when drag and drop a cloudmade extension in a qv screen and select all var (lat,log, Measurement and API Key (aac19a54d98c7bbc44380c80c9bdf99d), i don't have the image of map but all the markers is in there.

see de image:

What kind of problems i have here?

It's about a cloudmade API?

Thanks in advance.

Best Regards,

Pedro Lopes

[rbecher]

Hi Pedro,

this API doesn't work anymore. You should switch to Leaflet or OpenLayers. I started to work on a new and similar extension implementing OpenLayers on top of OpenStreetMap but it's far away from being done. Do not have much spare time yet to finish..

- Ralf

[#8]

Hi All,

I'm very interested in visualizing network data. So this extension has provided the 1st steps in doing that - Thanks Ralf for that. I'm curious if there is way to adjust the nodes in such a that it uses the entire chart area. In the below screenshot you will notice all the whitespace. If the extensions is able to use the whitespace then the network as a whole is more readable. Can you let me know if such a functionality already exists in this extension? if no how can i make it available.

Thanks
V

[rbecher]

Hi V,

I guess this issue is related to the two existing unconnected nodes that fill the upper left space. Usually it uses a filled circle / ellipse inside the available space (see first 3 screenshots in this thread). Could be possible to tweak around inside the Graph Dracula lib but this would be a profesional service I could offer..

- Ralf

[#10]

Hi Ralf

Thanks for the post, its been very helpfull. Is there any way that we could show the strength of the connections, for example the varying the size of the tooltips based on the number of conections?

Thanks

Peter

[rbecher]

Hi Peter,

could be possible. But it's part of a customizing with professional services.. For a real project I would choose the visualization library first related to the requirements and the given features. In the meantime I've build graph visualizations also with d3.js, sigma.js, graphviz and vis.js. Every lib has its strengths and weaks.

- Ralf