On 4/6/06, Michael Sorich <michael.sorich at gmail.com> wrote: > ... I would prefer for the result to be masked > when masked values are involved unless I explicitly indicate what should be > done with the masked values. ... This is the case in r2332: >>> from numpy.core.ma import * >>> print array([1,2,3], mask=[0,1,0]).cumsum() [1 -- --]