Class: prob.KernelDistribution
Package: prob

Standard deviation of probability distribution object


s = std(pd)


s = std(pd) returns the standard deviation s of the probability distribution pd.

Input Arguments

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pd — Probability distributionprobability distribution object

Probability distribution, specified as a probability distribution object. Fit a probability distribution object to data using fitdist or the Distribution Fitting app.

Output Arguments

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s — Standard deviationnonnegative scalar value

Standard deviation of the probability distribution, returned as a nonnegative scalar value.


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Standard Deviation of a Fitted Distribution

Load the sample data. Create a vector containing the first column of students' exam grade data.

load examgrades;
x = grades(:,1);

Create a probability distribution object by fitting a kernel distribution to the data.

pd = fitdist(x,'Kernel')
pd = 


    Kernel = normal
    Bandwidth = 3.61677
    Support = unbounded

Compute the standard deviation of the fitted distribution.

s = std(pd)
s =


See Also


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