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**SYMSQR(***matrix***)**

where *matrix* is a square numeric matrix.

The SYMSQR function takes a square numeric matrix
(size *n* ×*n*) and compacts the elements from the
lower triangle into a column vector (*n*(*n*+1)/2 rows).
The matrix is not checked for actual symmetry.
Therefore, the statement

sym=symsqr({1 2, 3 4});sets

SYM 3 rows 1 col (numeric) 1 3 4Note that the 2 is lost since it is only present in the upper triangle.

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