MATLAB: Customising the boxplot with data points.

boxplot

so the default boxplot contains err, a box with a line signifying the mean, and the upper 25 percentile and lower 25 percentile. I wanted to input the 'data points' together with the boxplot, so I can see how they are distributed. Can i do this?

Thanks

Best Answer

Well, you could have just tried it. That is often the best approach. But you may just not know how to use the hold command.

X = randn(100,1);
boxplot(X)
hold on
plot(1,X,'o')

Were it my choice, I might have used a histogram on the side instead. For example, split the window into subplots.

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MATLAB: Boxplot

This may partially answer what you want. Step 1 would be to take the data for "a" and stretch it out as you describe. Here's one way to expand a data vector according to a vector of frequencies:

f = [4 3 0 1 2];    % frequencies
d = [1 2 3 4 5];    % data
c = [0, cumsum(f)]; % cumulative sum of frequencies
x = zeros(1,c(end));
for j=1:length(c)-1
   x(c(j)+1:c(j+1)) = d(j); % insert each value as required
end

MATLAB: Boxplot / outlier: how to reduce outliers(boundry change)

Yes, by setting the "whisker" option. Compare these two figures:

rng(1)
x = randn(10000,5);
figure
boxplot(x)
figure
boxplot(x,'whisker',2)

Best Answer

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MATLAB: Boxplot / outlier: how to reduce outliers(boundry change)

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