On Sat, Aug 30, 2014 at 6:43 PM, <josef.pktd at gmail.com> wrote: > Is there a way to negate a boolean, or to change the sign of a float inplace > ? np.logical_not(arr, out=arr) np.negative(arr, out=arr) -n -- Nathaniel J. Smith Postdoctoral researcher - Informatics - University of Edinburgh http://vorpus.org