I only have the mean value and standard deviation value, how do I make a histogram with this?

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Aasiya Syed
Aasiya Syed 2020-5-3
回答： Walter Roberson 2020-5-3
My mean is -30.10 and my standard deviation is 7.79
My count is going to be a maximum limit of 150.
How would I construct a histogram with just this info?

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回答（2 个）

Mathias Andersen
Mathias Andersen 2020-5-3
This should do the trick.
x = 7.79*randn(150,1)-30.1;
histogram(x,'Normalization','pdf')
Walter Roberson
Walter Roberson 2020-5-3
https://www.mathworks.com/help/stats/normcdf.html
Use normcdf on two values representing the edges of the bin that you wish to have the maximum count of 350. diff() to find the probability associated with the bin. ceil() 350 divided by that probability. The result is the number of samples that you need to simulate so that the maximum expected count would be 350.
Now you can use normcdf on a vector of bin edges, diff, multiply by the sample size, and that gives the counts for the bins. Or you can generate the appropriate number of random points calculated and histogram.

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