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Operators and Keywords

Function List:

C++ API

: x = inv (A)
: [x, rcond] = inv (A)

Compute the inverse of the square matrix A.

Return an estimate of the reciprocal condition number if requested, otherwise warn of an ill-conditioned matrix if the reciprocal condition number is small.

In general it is best to avoid calculating the inverse of a matrix directly. For example, it is both faster and more accurate to solve systems of equations (A*x = b) with y = A \ b, rather than y = inv (A) * b.

If called with a sparse matrix, then in general x will be a full matrix requiring significantly more storage. Avoid forming the inverse of a sparse matrix if possible.

See also: ldivide, rdivide.

Package: octave