gauss中的cdfchic（x，v）=MATLAB中的1-chi2cdf（x，v）

这个GAUSS使用手册上有介绍。

y = cdfchic(x,n)
x： NxK matrix.
n： LxM matrix, ExE conformable with x.
y is the integral from x to ∞ of the chi-square distribution with n degrees
of freedom.
The elements of n must all be positive integers. The allowable ranges for
the arguments are:
x ≥ 0
n > 0
A -1 is returned for those elements with invalid inputs.
This equals 1-F(x,n), where F is the chi-square cdf with n degrees of
freedom. Thus, to get the chi-square cdf, subtract cdfchic(x,n) from
1. The complement of the cdf is computed because this is what is most
commonly needed in statistical applications, and because it can be
computed with fewer problems of roundoff error.

Example x = { .1, .2, .3, .4 };
n = 3;
y = cdfchic(x,n);
See also cdfbeta, cdffc, cdfn, cdfnc, cdftc, gamma
x NxK matrix.
n LxM matrix, ExE conformable with x.
y max(N,L) by max(K,M) matrix.
y=  0.991837
      0.977589
      0.960028
      0.940242

gauss手册 我看过了  可是不行  无法加解决我遇到的问题 依然不能将其改写成MATLAB命令 ，手册列出了三个英文的参考文献 不知道有没有用