Oh, that's my mistake If I try interactive >>> array(12,'f') 12.0 I thought 12.0 was a number, but it's really an array, so than there is no need for myasarray. Thanks. __Janko _______________ MATRIX-SIG - SIG on Matrix Math for Python send messages to: matrix-sig@python.org administrivia to: matrix-sig-request@python.org _______________