POLYPREDCI calculates prediction intervals for ‘polyfit’ and ‘polyval’ curve fits.

Reformats coeffs output to conform to MATLAB conventions for polynomial expression and evaluation.

Creates a square (0,1) random matrix with 1s on the main diagonal, and specified probability of 1s.

POLYPARCI calculates confidence intervals for parameters estimated by ‘polyfit’.

TSTAT3 computes: one- or two-sided t-probability, or the one-sided t-statistic (‘tinv’ equivalent).