How to plot Nightingale Rose Chart in Matlab

Hi all, I want to create a pie chart (Nightingale Rose Chart) Does anyone know how to do this?

This pie chart is an example of what I would like to achieve.

Hopefully this makes it a bit clearer. Thanks in advance!

[David K.]

It looks like polarhistogram is what you want. It looks like you will need to scale your data to be from 0 to 2pi and text can be put in with the text command. I am not sure how you could do color but it may be possible.

Answer 1

[Raunak Gupta]

Hi,

In my understanding the pie charts you are trying to plot can be drawn using polarhistogram. From the figure you have attached I can see there are 6 bins in the polarhistogram object.

I am assuming you have the background figure that is similar to a map. So, you can generate the individual polarhistogram using below code:

close all 
p = polaraxes; 
polarhistogram(p,'BinEdges', linspace(0,2*pi,7),'BinCounts',[0.3 0.1 0.2 0.8 0.57 0.7]); 
p.RLim = [0 1]; 
p.ThetaTick = []; 
p.RTickLabel = {}; 

The ‘BinCounts’ parameter can be changed based on the values you have in each category.

For Adding Multiple polarhistogram you may use App Designer. In that you can add multiple Polar Axes on top of the figure that contains the map. For drawing polarhistogram you need to have the positions of the axes.

Currently for plotting Nightingale Rose Chart directly with a function is not supported. You may use App Designer for plotting separately every individual object.

You may refer to following for using App Designer:

https://www.mathworks.com/help/matlab/app-designer.html

Answer 2

[suling yin]

Thanks Raunak Gupta ,

One more question: how can I set different color for each category in your example above.

Regards,

[Raunak Gupta]

Hi,

You can plot seperate categories as below but for legend you have to enter them as a text field in App Designer. For putting seperate color without plotting seperate part is there in histogram but not in polarhistogram. So , you can use below for plotting one pie chart.

close all
p = polaraxes;
polarhistogram(p,'BinEdges',[0 pi/3],'BinCounts',[0.56]);
hold on
polarhistogram(p,'BinEdges',[pi/3 2*pi/3],'BinCounts',[0.65]);
polarhistogram(p,'BinEdges',[2*pi/3 pi],'BinCounts',[0.35]);
polarhistogram(p,'BinEdges',[pi 4*pi/3],'BinCounts',[0.8]);
polarhistogram(p,'BinEdges',[4*pi/3 5*pi/3],'BinCounts',[0.57]);
polarhistogram(p,'BinEdges',[5*pi/3 2*pi],'BinCounts',[0.7]);
p.RLim = [0 1];
p.ThetaTick = [];
p.RTickLabel = {};
hold off

Hope this helps.

[suling yin]

Thanks Raunak Gupta

It is great help.

And can I specify the color for each categories ?

[Raunak Gupta]

Hi,

While plotting a single polarhistogram you may mention the color with 'FaceColor' option with predefined color string or RGB triplets.

Hope it helps.

Answer 3

[suling yin]

Thanks Raunak Gupta

It is great help.

And can I specify the color for each categories ?