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From: "John D'Errico" <woodchips@rochester.rr.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Chi-test distribution
Date: Thu, 1 Jan 2009 16:11:02 +0000 (UTC)
Organization: John D'Errico (1-3LEW5R)
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"Erez Livneh" <erezliv@gmail.com> wrote in message <gjil32$n92$1@fred.mathworks.com>...
> Hi Matlabers,
> 
> How do I get one-tailed probability of the Chi-test distribution?
> I require the same function as the CHIDIST function in Excel.
> 
> Thanks and Happy New Year!
> Erez

I've never heard of the Chi-test distribution.
Perhaps you are thinking of this instead?

help chi2inv
 CHI2INV Inverse of the chi-square cumulative distribution function (cdf).
    X = CHI2INV(P,V)  returns the inverse of the chi-square cdf with V  
    degrees of freedom at the values in P. The chi-square cdf with V 
    degrees of freedom, is the gamma cdf with parameters V/2 and 2.   
 
John