how to write the percentage into pie chart?

hi all, the attached pie chart shows the percentage of variance. I want to write the percentage inside sector and the txt definition outside. Please help me.

Answer 1

[Stephen23]

L = {'A','B','C','D','E'};
X = [  1,  3,0.5,2.5,  2];
H = pie(X);
%
T = H(strcmpi(get(H,'Type'),'text'));
P = cell2mat(get(T,'Position'));
set(T,{'Position'},num2cell(P*0.6,2))
text(P(:,1),P(:,2),L(:))

Creates this:

[Lilya]

Thank you for your help, Stephen. It works but doesn't agree with the actual data! here is it

 4.18885217289864
26.7356605415924
1.92721720841895
2.72413971200671
18.3084577561384
6.75871344379758
44.2124575513627
29.5231966970319
20.2626754201396
0.176357093909418
7.79200786130982
30.2901091873949

[Stephen23]

@Ms. Oceanographer: can you please explain how it "doesn't agree with the actual data". Note that you did not show me your code or your input data, so I have not way to check what you are doing. Is the order somehow incorrect? You need to explain what you expect and what is wrong with the result you are getting.

[Lilya]

the used function is var in the statistics toolbox to calculate the percentage of variance monthly.

for example:

 var_nov=var(y2a(303:332));
var_nov1=var(y1a(303:332));
var_nov2=var_nov/var_nov1;
var_Nov3= 100*(abs(1-var_nov2));

[Stephen23]

@Ms. Oceanographer: you need to explain, as I requested, what you expect and what you are getting. I cannot read your mind, so I cannot magically know what the correct output should be.

You question is not related to the statistics functions (I don't have that toolbox), so you simply need to give the data for the scatter function and show how you are calling it, and explain what you expect the output pie chart should look like.

[Lilya]

Sorry for that. The correct pie chart should contain the calculated data (i.e. Those I did), not those set by the default percentage of Matlab. I just want to write mine inside the sectors (the exact matrix).

Thank you for your attention and help again Mr. Stephen

[Stephen23]

If you do not want to use the percentages calculated by MATLAB, then you can also provide some alternative text strings yourself when you call the pie function, e.g.:

pie(X,labels)

This is explained clearly in the documentation, with examples.

[Lilya]

I appreciate it :)

[Jaladhar Mahato]

Is it possible to change the font size on the Labels? Because You changed the original texts into percentage.

[Jaladhar Mahato]

I got the answer. I have to just put 'FontSize' at the end text comment.

text(P(:,1),P(:,2),L(:),'FontSize',18)

[Gwen]

Hi, this was a really helpful answer. Thank you @Stephen Cobeldick. I am wondering if you can help me relocate some of the external text labels. You'll notice "NH4+" and "Na+" are written too close to the pie chart...

Thanks in advance!