sqrtm matrix square root

## Syntax

    y = sqrtm(x)

## Arguments

x

  a real or complex square matrix.

## Description

`y = sqrtm(x)` is the matrix square root of the `x` matrix (`x=y^2`). Result may not be accurate if `x` is not symmetric.

## Examples

    x=[0 1;2 4]
    w=sqrtm(x);
    norm(w*w-x)
    x(1,2)=%i;
    w=sqrtm(x);norm(w*w-x,1)

## See also

- expm
- sqroot