cor(x1 [,x2,...]), x1, x2, ... REAL vectors or matrices all with the same number of rows |

cor(x) computes a correlation matrix for data in REAL matrix x. Any row of x that contains missing data is entirely omitted. It is an error to have missing data in all rows. cor(a,b,c,... ), where a, b, c, ... are vectors or matrices with the same number of rows, is equivalent to cor(hconcat(a,b,c,...)) . See hconcat(). When any column in the input is constant (all values the same), the entire corresponding row and column of the output is set MISSING, including the diagonal, and a warning message is printed. In particular this occurs when the number of rows in the input is 1. Non-MISSING elements of the diagonal are exactly 1.

Gary Oehlert 2003-01-15