How to overlay a curve over histogram?

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Chiara Petrillo
Chiara Petrillo on 26 Apr 2017
Edited: Andrew Newell on 26 Apr 2017
Hi There,
New to Matlab so sorry if the question is simple!
I have plotted a histogram with the following code:
data = csvread('testformatlab.csv')
col1 = data(:,8); %all rows in column 1
col2 = data(:,14);
X = (col1)./(col2);
histogram(X);
*I would like to overlay a curve to the histogram, similar to the red one in the attached image. My current histogram is shown in the blue image.
Thankyou!!!

Answers (1)

Andrew Newell
Andrew Newell on 26 Apr 2017
Edited: Andrew Newell on 26 Apr 2017
If you already have the curve, then just type hold on and plot it. An example:
ydata = randn(1000,1);
hist(ydata)
hold on
x = min(ydata):0.1:max(ydata);
y = 500*normpdf(x);
plot(x,y,'r')

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