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Inverse of the F cumulative distribution function (cdf).
Syntax
X = finv(P,V1,V2)
Description
finv(P,V1,V2) computes the inverse of the F cdf with numerator degrees of freedom,V1, and denominator degrees of freedom, V2, for the probabilities in P. The arguments P, V1 and V2 must all be the same size except that scalar arguments function as constant matrices of the common size of the other arguments. The parameters V1 and V2 must both be positive integers and P must lie on the interval [0 1]. The F inverse function is defined in terms of the F cdf:
Examples
Find a value that should exceed 95% of the samples from an F distribution with 5 degrees of freedom in the numerator and 10 degrees of freedom in the denominator.x = finv(0.95,5,10)
x =
3.3258
You would observe values greater than 3.3258 only 5% of the time by chance.