[Numpy-discussion] improved NumPy support for boolean arrays?

Robert Kern robert.kern@gmail....
Wed Aug 5 15:04:10 CDT 2009


On Wed, Aug 5, 2009 at 15:01, Dr. Phillip M.
Feldman<pfeldman@verizon.net> wrote:
>
> Although I've used Matlab for many years and am quite new to Python, I'm
> already convinced that the Python/NumPy combination is more powerful and
> flexible than the Matlab base, and that it generally takes less Python code
> to get the same job done. There is, however, at least one thing that is much
> cleaner in Matlab-- operations on boolean arrays. If x and y are numpy
> arrays of bools, I'd like to be able to create expressions like the
> following:
>
> not x (to invert each element of x)

~x

> x and y

x & y

> x or y

x | y

> x xor y

x ^ y

> (not x) or y

(~x) | y

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
  -- Umberto Eco


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