10 Replies Latest reply on Jan 31, 2019 4:48 PM by Hari Ankem

# Node-edge network visualization with cartesian coordinates

Hi everybody!

I'm a newbie of Tableau, so sorry if the question sounds really silly.

I'm trying to visualize some nodes linked by edges, which should be something similar to a spider-map.

The point is that my nodes have cartesian coordinates (they actualy are talairach coordinates through the human brain, but can be seen as standard x,y,z). All the tutorials I found for this kind of visualization are based on longitude/latitude measures. Is there a way to do the same but working on my original cartesian coordinates? Or is there a proper way to convert cartesian in to long/lat? A minor point is that when I use long/lat I automatically visualize the map, that I don't need, can this be avoided?

Bests,

Jordi

• ###### 1. Re: Node-edge network visualization with cartesian coordinates

It may be easy for people to suggest an appropriate solution if you provide some data and an expected output from that data.

• ###### 2. Re: Node-edge network visualization with cartesian coordinates

Thanks Hari Ankem, you are right!

I attached an image of what I was able to visualize so far. I would just like to link couples of nodes drawing an edge between them.

For each node I have the x,y,z cartesian coordinates (z is not being used here). I also know the couples of nodes to be connected, and I can arrange it in the input data depending the better way to visualize it.

Thanks again!

• ###### 3. Re: Node-edge network visualization with cartesian coordinates
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• ###### 4. Re: Node-edge network visualization with cartesian coordinates

Thank you.

I followed those tutorials some days ago, but they use latitude and longitude, which I don't have in my case. Do I have to convert cartesian in to long/lat?

• ###### 5. Re: Node-edge network visualization with cartesian coordinates

No, you can use co-ordinates too. For all the points that you plan to connect, you will need to duplicate the records and have a column which will identify the path. If you need further help with it, I will need your data and/or the packaged workbook.

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• ###### 6. Re: Node-edge network visualization with cartesian coordinates

I'm not sure I know how to send packaged workbooks here in the forum, but the visualization seems to work now! Thank you!

Just one more question. Is there a way to change independently the size of the points and of the linking lines? I tried to make a variable coding the node size and than drag it on the size option, but it changes the size of both the node and the connection.

Thank you again!

• ###### 7. Re: Node-edge network visualization with cartesian coordinates

Please see if you can convert it into a dual-axis chart in which case you can have lines using one axis, and the other for the points.

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• ###### 8. Re: Node-edge network visualization with cartesian coordinates

And as far as including a packaged workbook is concerned, you should click on the title of the thread and then when you post your replies, you should see an option to attach files.

• ###### 9. Re: Node-edge network visualization with cartesian coordinates

Perfect!

You really solved me a relevant problem.

Thank you!

Bests

• ###### 10. Re: Node-edge network visualization with cartesian coordinates

You are welcome.