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how to stack hist?

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davit petraasya
davit petraasya 2016-6-30
评论： Joris Bockhofer 2023-7-5
Does anyone knows how to stack 2 histogram. I have certain area data for 20 years. I am calculating yearly number of events by hist command. And also I have another area data for 20 years. Doing the same, calculating yearly number of events by hist command for the area also. Note for 2 data time the same, 1980-2000 in years.
Now I wanted 2 hist data stack. Is there any way to do it?
Thanks!
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José-Luis
José-Luis 2016-6-30
I still don't get it. Could you show a figure as an example? And some data?
Stephen Licata
Stephen Licata 2020-12-23
编辑：Stephen Licata 2020-12-23
That is a very good and fun example - many thanks!
BTW, if you want a special color, like 'gray' (which does not have a Matlab shortcut symbol code), do this bar command
bar(binrng,counts2,'FaceColor', [0.75 0.75 0.75])
which is equivalent to this version using the RGB integer values:
bar(binrng,counts2,'FaceColor', [192 192 192]/255)

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Star Strider
Star Strider 2016-6-30
The hist function does not offer a 'stacked' option, but you can create the effect easily enough with the histc function and a bar plot.
Experiment with this to get the result you want with your data:
d1 = randi(9, 50, 1); % Create Data
d2 = randi(9, 50, 1); % Create Data
binrng = 1:9; % Create Bin Ranges
counts1 = histc(d1, binrng); % Histogram For ‘d1’
counts2 = histc(d2, binrng); % Histogram For ‘d2’
counts3 = counts1 + counts2; % Histogram Sum ‘d1’+‘d2’
figure(1)
bar(binrng, counts3, 'b')
hold on
bar(binrng, counts1, 'y')
hold off
legend('Data 1', 'Data 2')
The idea is straightforward: create histogram counts for both sets of data, add them, then use the bar plot to first plot the sum, then overplot with one of the others. That will create your stacked histogram plot.
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Star Strider
Star Strider 2021-7-15
Ran in:
That’s a bit ambiguous.
Perhaps:
v1 = randi(9,1,50);
v2 = randi(9,1,50);
v3 = randi(9,1,50);
v4 = randi(9,1,50);
v5 = randi(9,1,50);
v6 = randi(9,1,50);
vm = [v1; v2; v3; v4; v5; v6];
binrng = 1:9;
for k = 1:size(vm,1)
counts(k,:) = histc(vm(k,:), binrng);
end
figure
bar(binrng,counts,'stacked')
grid
Experiment, if necessary, to get different results.
.
Joris Bockhofer
Joris Bockhofer 2023-7-5
Make sure to use histc!
MatLab recommended using histcounts instead but this will not work because histcounts yields one less value than #bins for whatever reason.

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