Histogram of 2 sets of data in same plot, different columns, same bin

Hello,

I have been searching for quite some time now for an answer to this question. How can I create a histogram of two sets of data where each set has a different color? All the answers I have found shows how I can overlay two histograms, but I want each bin to show two columns with different colors.

Example 4 on the following page http://www.mathworks.se/help/symbolic/mupad_ref/plot-bars2d.html does exactly what I want (but shown with 3 sets of data). However, this is for MuPAD. How can I do this in Matlab?

To describe in more detail:

I have:

-P1 and P2 who are the two data sets (1x1000 vectors). -I set a vector v=-30:30 that I use for binning both in the following way:¨

[n1,p1]=hist(P1,v)
[n2,p2]=hist(P2,v)

Then if I use the bar command together with 'hold on', I get two histograms where the columns overlap.

bar(p1,n1);hold on; bar(p2,n2,'facecolor','r')

I want them to be side by side for each column.

Thank you for your help!

[Diemo Schwarz]

hist([P1, P2]) should group your data.

However, this functionality seems to be lost in the new histogram function.

Answer 1

[Chad Greene]

Instead of plotting the bars side by side, have you considered plotting them on top of each other and adjusting transparency? Transparency is easily set with histf.

Answer 2

[Amir]

Please try this code, I have modified this .

clc
clear
close all
nbins=20;
series1 = [10,25,90,35,16, 8, 25, 55, 55];
series2 = [7,38,31,50,41,25,90,35,16];
[series1,centers] = hist(series1,nbins);
[series2] = hist(series2,centers);

DataSum=series1+series2;
figure
width1 = 0.5;
bar(centers,DataSum,width1,'FaceColor',[0.2,0.2,0.5],....
                     'EdgeColor','none');
hold on
width2 = width1;
bar(centers,series2,width2,'FaceColor',[0,0.7,0.7],...
                     'EdgeColor',[0,0.7,0.7]);
hold off
legend('First Series','Second Series') % add legend

Answer 3

[dpb]

 bar([p1;p2],[n1;n2],'grouped')

doc bar  % look at example under "Bar Graph Styles"

Answer 4

[yousra boukaissi]

figure hist ([P1 P2])