[SciPy-user] numpy's math library?

Robert Kern robert.kern at gmail.com
Wed Jan 11 21:40:59 CST 2006


David M. Cooke wrote:
> Robert Kern <robert.kern at gmail.com> writes:
> 
>>David M. Cooke wrote:
>>
>>>I've also exposed log1p(x) = log(1+x) and expm1(x) = exp(x)-1 as
>>>ufuncs, since those are quite useful if you're worrying about
>>>cancellation errors.
>>
>>Of course, they're useful, but they're also in scipy.special. Let's try not to
>>migrate more things from scipy to numpy than we strictly have to. So, I'm -1 on
>>exposing log1p() and expm1() in numpy.
> 
> They're also part of the C99 standard, so I'd say there is some
> argument for making them part of numpy: exposing functions already
> defined by the C library. Mind you, we're also missing exp10, pow10,
> exp2, log2, cbrt, erf, erfc, lgamma, tgamma, and a few others.

Okay, that changes my mind.

-- 
Robert Kern
robert.kern at gmail.com

"In the fields of hell where the grass grows high
 Are the graves of dreams allowed to die."
  -- Richard Harter



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