Module rgsl::randist::chi_squared
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The chi-squared distribution arises in statistics. If Y_i are n independent Gaussian random variates with unit variance then the sum-of-squares,
X_i = \sum_i Y_i2
has a chi-squared distribution with n degrees of freedom.
Functions
chisq |
This function returns a random variate from the chi-squared distribution with nu degrees of freedom. The distribution function is, |
chisq_P |
This function computes the cumulative distribution functions P(x), Q(x) and their inverses for the chi-squared distribution with nu degrees of freedom. |
chisq_Pinv |
This function computes the cumulative distribution functions P(x), Q(x) and their inverses for the chi-squared distribution with nu degrees of freedom. |
chisq_Q |
This function computes the cumulative distribution functions P(x), Q(x) and their inverses for the chi-squared distribution with nu degrees of freedom. |
chisq_Qinv |
This function computes the cumulative distribution functions P(x), Q(x) and their inverses for the chi-squared distribution with nu degrees of freedom. |
chisq_pdf |
This function computes the probability density p(x) at x for a chi-squared distribution with nu degrees of freedom, using the formula given above. |