Grocer Function

NAME

chis_pdf - chi-squared probability distribution

CALLING SEQUENCE

[f]=chis_pdf(x,a)

PARAMETERS

Input

Output

DESCRIPTION

Returns the pdf at x of the chi-squared(n) distribution. NOTE: chis_pdf(x,n) = gamm_pdf(x/2,n/2)/2

EXAMPLES

1) y=chis_pdf([1:4],2)
2) y=chis_pdf([1:4],2*ones(1,4))

Examples 1 and 2 do exactly the same thing: they provide the (1x4) vectors of probabilities that a chi-square is greater than 1, 2, 3 and 4 respectively.

AUTHOR

Eric Dubois 2002