Re: [Numpy-discussion] argsort in descending order
On Fri, 05 Sep 2008 07:02:38 -0700, SimonPalmer wrote: another newb question I suspect, but is there a way to instruct argsort to sort in descending order or should I just sort and reverse? Just sort and subtract to get the reverse order. I can think of two reasonable ways to do it with no copying: from numpy import * a = rand(100) # this does NOT make a copy of a, simply indexes it backward, and should # be very fast reverseorder = argsort(a[::-1]) # this way doesn't make a copy either, and probably is a little slower # since it has to do many subtractions reverseorder = len(a)-1-argsort(a) HTH, Dan ___ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
[Numpy-discussion] does numpy have funcs like isanynan() or isallfinite()?
hi all, does numpy have funcs like isanynan(array) or isallfinite(array)? I very often use any(isnan(my_array)) or all(isfinite(my_array)), I guess having a single case triggered on would be enough here to omit further checks. Regards, D. ___ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
Re: [Numpy-discussion] isnan and co: cleaning up
Charles R Harris wrote:
This one http://en.wikipedia.org/wiki/Indent_style#K.26R_style
int main(int argc, char *argv[])
{
...
while (x == y) {
something();
somethingelse();
if (some_error)
do_correct();
else
continue_as_usual();
}
finalthing();
...
}
I'm a bit of a heretic myself, I always use braces in if statements, even for
one liners.
me too ( I believe it avoids mistakes when the one statement becomes 2
- although recent gcc may have a warning for that).
I think I will use the same technique as R to detect those functions
(because it may be a macro or a function; C99 says function, but old
platform and the MS one do not have macro).
cheers,
David
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Re: [Numpy-discussion] does numpy have funcs like isanynan() or isallfinite()?
On Sat, Sep 6, 2008 at 02:21, dmitrey [EMAIL PROTECTED] wrote: hi all, does numpy have funcs like isanynan(array) or isallfinite(array)? No. -- 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 ___ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
Re: [Numpy-discussion] Are the CPP symbols HAVE_LONGDOUBLE_FUNCS and HAVE_FLOAT_FUNCS public ?
Sat, 06 Sep 2008 12:15:59 +0900, David Cournapeau wrote: On Fri, Sep 5, 2008 at 4:50 PM, Pauli Virtanen [EMAIL PROTECTED] wrote: If you remove them, please put a reminder somewhere (eg ticket) to update the documentation accordingly. Is there a reason for not updating the documentation in the patch (well, branch) itself ? Not really. Also that would be OK, just as long as someone remembers to do it. -- Pauli Virtanen ___ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
Re: [Numpy-discussion] isnan and co: cleaning up
On Sat, Sep 6, 2008 at 5:40 PM, David Cournapeau [EMAIL PROTECTED] wrote: Charles R Harris wrote: This one http://en.wikipedia.org/wiki/Indent_style#K.26R_style Patch available here: http://scipy.org/scipy/numpy/ticket/907 Tested with gcc on mac os X, it also builds with VS 2003 (but I could not test there because of another problem with numpy and VS 2003, unrelated to this). David ___ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
