Re: [Numpy-discussion] NaN value processing in weave.inline code

14 Jan 2011


      On Fri, Jan 14, 2011 at 12:03 PM, Joon Ro <joonpyro@gmail.com> wrote:
...
Hi,
I was wondering if it is possible to process (in if statement - check if the
given value is NaN) numpy NaN value inside the weave.inline c code.
testcode = '''
if (test(0)) {
      return_val = test(0);
}
'''
err = weave.inline(testcode,
 ['test'],
type_converters = converters.blitz, force = 0, verbose = 1)
with test(0) = nan returns err = nan correctly, but I don't know how to
check the nan value inside the c inline c code. Is there any way I can get
similar functionality as isnan?
To check if a scalar, x, is NaN:

if x == x:
    # No, it is not a NaN
else:
    # Yes, it is a NaN

Re: [Numpy-discussion] NaN value processing in weave.inline code

Keith Goodman