scipy.linalg.lapack.dtpttr

scipy.linalg.lapack.dtpttr(n, ap, uplo='U') = <flapack function dtpttr>

Convert a triangle from packed (TP) to full (TR) storage (LAPACK dtpttr).

Parameters:

nint

Order of the square matrix.

apndarray

The triangle in packed storage (TP), length n * (n + 1) / 2.

uplostr, optional

'U' if the matrix is upper triangular, 'L' if lower. Default is 'U'.

Returns:

andarray

The triangle in full storage, shape (n, n); the other triangle is zero.

infoint

0 on success; if negative, the -info-th argument had an illegal value.