realsqrt
realsqrt(X) returns the square root for each element in X (each of these must be a real positive value).
Examples
> X = [4 3; 2 1]# 4 3 2 1 > realsqrt(X)# 2 1.73205 1.41421 1
> X = [4 3; 2 1]# 4 3 2 1 > realsqrt(X)# 2 1.73205 1.41421 1