Treemap in Protovis - javascript

I liked the protovis library at http://vis.stanford.edu/protovis. I am trying to use it to create a treemap. Is there a way in Protovis' treemap layout by which we can indicate maximum level to show. Basically, I have a deep tree with depth 5 but I want to show nodes upto 3 levels only. If a user navigates into a node at level 3 then show its children, if any.
Any comments and help will be greatly appreciated.
Thanks

You should take a look at Mike Bostock's new charting implementation. Think about it as the next version of protovis and is called D3. It is actively being developed and is in the process of porting most parts of protovis to it. You can check the development groups in google groups. There is a simple program showing what you need to do in bursting treemap.

Related

Which D3 Layout should I use to show relationships?

Hi I'm just getting into Data Visualization and D3 and I'm trying to make a diagram that conveys the relationships between a group of people and I was wondering if I should use a Chord Diagram layout or a Hierarchal Bundling layout?
I like the look of the edges in Hierarchal Bundling layout but I really don't have an Hierarchy. Also Im not sure how the bundling works.
Can I make a chord layout in D3 with just strokes and not fills?
Here's a list of resources that can help you choose the right visualization technique for your data:
How to design Charts and Graphs
Guide to Visual Communication
Visualization Cheatseet by Tom MacWright
A Tour through the Visualization Zoo by Jeffrey Heer, Michael Bostock, and Vadim Ogievetsky
if you have number of people plototed against their attributes, then parallel plotting is the best option. In parallel Plotting you can compare the feature of 1 perso with another on the same chart.
Here are the two links that will help you in creating parallel coordinates:
parallel chart 1 with all the capability making use of 1 library`
The famous chart directory blocks.org

Comparison of two network graphs

I have two network graphs but placing both of them next to each other is the easiest way to compare if the graphs are small. But as the graph grows, it is making hard for the user to compare the views. I wanted to know the best way to merge two graphs and show the comparison.
In the above picture it can be seen that no of nodes are same but the way they are linked is different.
I would like to know how to present the compared data.
Any ideas about different views to present such comparison using d3.js.
I would suggest not trying to apply force layout or similar method for drawing graphs (that would draw the graph in a fashion similar to the on in the picture in your question). Instead, I wold like to suggest using circular layout for both graphs (similar to chord diagram):
This visual example is made for other purposes, but similar principles could be applied to your problem:
Layout all vertexes on a circle, in equidistant style (if there are some vertices belonging only to one of two graphs, they can be grouped and marked different color)
If there is a link between two vertices in both graphs, connect them in one color (lets say green)
If there is a link between two vertices in one graph only, connect them in appropriate color, dependant on a graph (lets say red and purple)
This method scales well with number of vertices.
Hope this helps.
Following methods for network comparison could be useful in the current scenario:
NetConfer, a web application
Nature Scientific Reports, an article guiding comparisons
CompNet, a GUI tool

Linking dygraphs.js to d3 charts

I'm currently working on building a charting web application, and I've chosen dygraphs for my time series data (Two weeks of data at an hourly level, if anyone finds this information relevant). On the same page, I also have a couple of customized d3.js charts that pull metrics from the same database as the trendline.
I want to know if I will be able to link the selection on my dygraph line (Supposing I zoom in on 3 hours worth of data, i.e., 3 rows) - to my d3 charts, so that the data in the d3 charts also get filtered down to the date range chosen by zooming in?
I'm quite the amateur here, and apologize if my question seems vague, but any sense of direction would be helpful.
I'm guessing I should be able to do this by modifying some class in the dygraphs source code, or reference the same from my d3 chart.
Thanks.
You shouldn't have any trouble doing this. There's no need to modify the dygraphs source. You can implement handlers on the dygraph object (zoomHandler or drawCallback, most likely) which update the D3 chart.
See this demo for an example of synchronization between multiple dygraphs.

ready to use dynamic pie chart in d3.js

I am evaluating to change the graphics I generated so far using highcharts.js to d3.js
just for fun and I want to learn how d3.js works.
I wonder if there is something similar to the url below (see if you click on a pie it gives you new data), something dynamic and ready to use (or not to implement from zero).
What I wanna achieve, more or less...
http://lully.snv.jussieu.fr/gbif/mapping/graphs/examples/pie-legend.htm
thanks in advance
Pere
If you want to replace Highcharts, I think the only good open-source alternative available at the moment is Bob Monteverde's Novus charts library: http://novus.github.com/nvd3/. NVD3 has a nice pie chart and also has good legends. Take a look at all the charts from this library and you will see what I mean. You can also find a good pie chart in Stephen Boak's tutorial: http://blog.stephenboak.com/2011/08/07/easy-as-a-pie.html. Another interesting option is to look for Frank Guerino's questions on the D3 js google group. I would use NVD3 if I were you. It might need some adjustments, but it seems to be the best option currently. Good luck!
Simple function to generate Pie Charts utilisiing d3.js. This function is part of the http://xhprof.io/ project. It is able to handle datasets of arbitrary size. It has several options that allow for customisation, such as the label margin, circle radius and visibility of the percentage data (refer to the source code).
The demo is available at https://dev.anuary.com/858b33b7-bd66-507b-a9f1-533e4de79ba3/. The source code is available at https://github.com/gajus/pie-chart.

Editable javascript chart - interactively resize bars or pie sections

I need a library or a framework plugin that can draw charts that can be modified real-time by resizing part of the chart itself. Is there such thing?
I plan to use it for adjusting the chart values. Mostly for controlling amount allocation.
For example. You have 4 hours and you have 5 distinct types of tasks. I want the user to be able to allocate time for each task and see visually what's the impact on the available time.
I think Visually Editable Charts of Fusion Charts is what you are looking for.
We use various charts from http://code.google.com/apis/chart/ for our web app, and it works great.
The chart are loaded once, and refreshed, each time the user change a value, with new data through their Javascript API in real-time.
gRaphael should be the most popular:
http://g.raphaeljs.com/
I can recommend HighCharts:
http://www.highcharts.com/
Found a few options: http://jamesalvarez.co.uk/uncategorized/draggable-piechart-js-class and http://www.shodor.org/interactivate/activities/PieChart/.
The first one looks the most promising.

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