Quantcast

Documentation Center

  • Trial Software
  • Product Updates

Contents

std

Class: prob.KernelDistribution
Package: prob

Standard deviation of probability distribution object

Syntax

s = std(pd)

Description

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

Input Arguments

expand all

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

expand all

s — Standard deviationnonnegative scalar value

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

Examples

expand all

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 = 

  KernelDistribution

    Kernel = normal
    Bandwidth = 3.61677
    Support = unbounded

Compute the standard deviation of the fitted distribution.

s = std(pd)
s =

    9.4069

See Also

|

Was this topic helpful?