histogram bins with different colors

134 views (last 30 days)
Hello Everybody,
I'd be glad if you could help me in building a histogram with different color for each histogram bin.
Before asking, I've tried to define for loops and a matrix of colors, without succeding.
My problem is that T.ConstructionYear is a 1531 x 1 numeric vector, and I'd have a different color for each bin. I left auto mode for the number of bins choice.
I've also tried to write the function for just two bins.
Thanks in advance for the help.
h1 = histogram(T.ConstructionYear, 'FaceColor', 'b');
xlabel('ConstructionYear');
ylabel('Number of Bridges');
title('Distribution of Construction Year Data');

Accepted Answer

Scott MacKenzie
Scott MacKenzie on 26 Apr 2021
Edited: Scott MacKenzie on 26 Apr 2021
I'm not sure if you can do this with histogram. Here's what I put together using histcounts and bar instead:
d1 = rand(1531,1); % put your T.ConstructionYear data here
myColor = rand(10,3); % 10 bins/colors with random r,g,b for each
d2 = histcounts(d1);
b = bar(d2, 'facecolor', 'flat');
b.CData = myColor;
xlabel('ConstructionYear');
ylabel('Number of Bridges');
title('Distribution of Construction Year Data');
  5 Comments
Giuseppe Degan Di Dieco
Giuseppe Degan Di Dieco on 18 May 2021
Thanks Scott!
Wow, with your tip I got a figure that occupies the entire screen.
I didn't know it.
Best!

Sign in to comment.

More Answers (1)

Giuseppe Degan Di Dieco
Giuseppe Degan Di Dieco on 4 May 2021
Edited: Giuseppe Degan Di Dieco on 4 May 2021
As a follow up to this thread, I've developed the below script to show the legend of multiple bars.
I've found some posts on this wonderful community, and then put them together.
%How to have a legend for each bin. For starting, trial with two bins and
%with a for loop
d1 = rand(2, 1); %a random-value 2 x 1 vector
myColor = rand(2, 3); %2 bins/color triplet with random r, g, b for each
d2 = histcounts(d1); %apply the histcounts function to the data
hold on
for i = 1:length(d1)
b = bar(d1(i), d2);
b.CData(i, :) = myColor(i, :);
end
b.BarWidth = 0.4;
xlabel('Construction Year');
ylabel('Number of Bridges');
title('Distribution of Construction Year Data');
legend('location', 'bestoutside')
hold off

Categories

Find more on Data Distribution Plots in Help Center and File Exchange

Products


Release

R2020b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!