var
Syntax
var(X)
Arguments
X is a scalar/vector/matrix.
Details
If X is a vector, return the the (unbiased) sample standard variance of X.
If X is a matrix, calculate the the (unbiased) sample standard variance of each column of X and return a vector.
As with all aggregate functions, NULL values are not included in the calculation.
Note: The result is sample variance instead of population
variance.