How can I plot the percentage value in an histc plot?

Hi, I have an histogram. In x-axis I have the name of each bar and in y-axis the data quantity. I would like to plot up to each bar of the histogram the respectively percentage. How can I do that?

Answer 1

[Mukul Rao]

Hi , I assume by "up to" you mean on top of the histogram. I recommend using text objects and adding them as shown in the code below:

%Generate data, use example from histc documentation
rng(0,'twister')
x = randn(100,1);
binranges = -4:4;
[bincounts] = histc(x,binranges);

%Compute percent contributions
percentagevalues = bincounts./sum(bincounts) * 100;

%Create a histogram
figure
bar(binranges,bincounts,'histc')

for i = 1:length(bincounts)-1
    %Determine x location of label
    x = (binranges(i) + binranges(i+1))/2;
    %Determine y location of label, offset it by some distance from the
    %top of the bar
    y = bincounts(i)+1;
    %Create a text object
    text(x,y,num2str(bincounts(i),'%3.2f'),'HorizontalAlignment','center');
end

Note if this example doesn't address your question, please provide additional information so that some other person from the community can provide an alternate solution.