How to rescale the y-axis of a histogram?

Let' say that we have 100 data points, and we’re making a histogram.

[counts] = histcounts(data)

sum(counts) should equal to 100.

If I were to normalize the histogram, in other words, we normalize the y-axis, the total count would equal to 1.

Notice here I am not changing the original data, I am simply changing the counts or the y-scale.

Now, I would like to rescale the y-axis, such that the total count would equal 200.

The new plot should follow the same distribution as before, except it has a different y-scale.

Is there a way to do this?

Answer 1

[Star Strider]

One approach:

X = randn(1, 420);
[N,edges] = histcounts(X, 'Normalization', 'probability');
xbar = edges(1:numel(N)) + mean(diff(edges))/2;

figure
bar(xbar, N)
grid
yt = get(gca, 'YTick'); 
ytix = linspace(min(yt), max(yt), 10);
set(gca, 'YTick',ytix, 'YTickLabel',fix(ytix*200/max(yt)))

Experiment to get different results.

[Michael]

nice

[Star Strider]

Thank you!

Answer 2

[Image Analyst]

You can use ylim() to scale the y axis. Use it to set the min and max value of the y axis to whatever you want them to be.