Numeric write-in place facility

[Ionel Simionescu]

Hi,

In a post on the wxPython list, Markus Gritsch suggested that array ops such
as
a = a+b
can be done faster by using write-in place:
Numric.add(a,b,a)

Playing around I see now that other ufuncs allow a write-in target
specification as their last argument. For example,

Numeric.sqrt(a,b)

will put the result in b (if its dimension and type are Ok).

The docs do not tell much about this.
Can anyone confirm/clarify/comment ?

Thanks,
ionel