wolffd@0: From ftp://ftp.mathworks.com/pub/contrib/v4/stats/chisquared/
wolffd@0: 
wolffd@0: Chi-squared probability function.
wolffd@0: 
wolffd@0: Abstract 
wolffd@0: m-files to compute the Chi-squared probability function, and
wolffd@0: the percentage points of the probability function.
wolffd@0: 
wolffd@0: P = CHISQUARED_PROB( X2, v ) returns P(X2|v), the probability
wolffd@0: of observing a chi-squared value <= X2 with v degrees of freedom.
wolffd@0: This is the probability that the sum of squares of v unit-variance
wolffd@0: normally-distributed random variables is <= X2.
wolffd@0: 
wolffd@0: Conversely:
wolffd@0: X2 = CHISQUARED_TABLE( P, v ) returns the X2, the value of
wolffd@0: chi-squared corresponding to v degrees of freedom and probability P.
wolffd@0: 
wolffd@0: In reference textbooks, what is normally tabulated are the
wolffd@0: percentage points of the chi-squared distribution; thus, one
wolffd@0: would use CHISQUARED_TABLE rather than interpolate such a table.
wolffd@0: 
wolffd@0: References: Press et al., Numerical Recipes, Cambridge, 1986;
wolffd@0: Abramowitz & Stegun, Handbook of Mathematical Functions,
wolffd@0: Dover, 1972;  Table 26.8
wolffd@0: 
wolffd@0: Peter R. Shaw
wolffd@0: Woods Hole Oceanographic Institution, Woods Hole, MA 02543
wolffd@0: (508) 457-2000 ext. 2473
wolffd@0: pshaw@whoi.edu
wolffd@0: 
wolffd@0: --FILES GENERATED--
wolffd@0: README_chisq
wolffd@0: chisquared_prob.m  (function) -- chi-squared probability function
wolffd@0: chisquared_table.m  (function) -- "percentage points" (i.e., inverse)
wolffd@0:                                    of chi-squared probability function
wolffd@0: chiaux.m (function) -- auxiliary fn. used by chisquared_table