Programmer Guide/Command Reference/EVAL/var: Difference between revisions
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Revision as of 17:31, 18 November 2010
var
The variance of the vector xv.
| Usage: | var(xv) |
| Result type: | scalar |
The covariance of the vector xv and yv.
| Usage: | var(xv,ys) |
| Result type: | scalar |
The covariance matrix for the column vector of the matrix xM. The column average a[j] is either calculated with avr(xM[*,j]) or through the argument y (a[j] = yS or a[j] = yV[j]).
| Usage: | var(xm) |
| var(xm,ys) | |
| var(xm,yv) | |
| Result type: | matrix - (ncol(xm) x ncol(xm)) |
