pearspdf

version 1.4.0.0 (4.83 KB) by Pierce Brady
Pearson system probability distributions

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Updated Sun, 14 Aug 2011 14:03:52 +0000

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% pearspdf
% [p,type,coefs] = pearspdf(X,mu,sigma,skew,kurt)
%
% Returns the probability distribution denisty of the pearsons distribution
% with mean `mu`, standard deviation `sigma`, skewness `skew` and
% kurtosis `kurt`, evaluated at the values in X.
%
% Some combinations of moments are not valid for any random variable, and in
% particular, the kurtosis must be greater than the square of the skewness
% plus 1. The kurtosis of the normal distribution is defined to be 3.
%
% The seven distribution types in the Pearson system correspond to the
% following distributions:
%
% Type 0: Normal distribution
% Type 1: Four-parameter beta
% Type 2: Symmetric four-parameter beta
% Type 3: Three-parameter gamma
% Type 4: Not related to any standard distribution. Density proportional
% to (1+((x-a)/b)^2)^(-c) * exp(-d*arctan((x-a)/b)).
% Type 5: Inverse gamma location-scale
% Type 6: F location-scale
% Type 7: Student's t location-scale
%
% Examples
%
% See also
% pearspdf pearsrnd mean std skewness kurtosis
%

It's a modification of the pearsrnd function

Cite As

Pierce Brady (2022). pearspdf (https://www.mathworks.com/matlabcentral/fileexchange/26516-pearspdf), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2009b
Compatible with any release
Platform Compatibility
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