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Scilab help >> Linear Algebra > Factorization > sqroot

# sqroot

W*W' hermitian factorization

### Calling Sequence

`sqroot(X)`

### Arguments

X

symmetric non negative definite real or complex matrix

### Description

returns W such that `X=W*W'` (uses SVD).

### Examples

```X=rand(5,2)*rand(2,5);X=X*X';
W=sqroot(X)
norm(W*W'-X,1)

X=rand(5,2)+%i*rand(5,2);X=X*X';
W=sqroot(X)
norm(W*W'-X,1)```

### See Also

• chol — Cholesky factorization
• svd — singular value decomposition
 Report an issue << householder Factorization Kernel >>

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