In article <[EMAIL PROTECTED]>,
"Sterling Hughes" <[EMAIL PROTECTED]> wrote:
[snip]
>> > >However, IMO the log, exp, sinus, etc. functions should be in the
>> > >core.
>> >
>> > Yes, I agree, however, expm1 and log1p don't.
>>I agree. Do you suggest here to hold these two, until some kind of
>>advanced-math-extension will be added?
Perhaps not too many people that use PHP for biz purposes use them,
but the few that do use it for some scientific/math stuff will appreciate
those functions, in particular when dealing with numerical methods
(derivation, integration, etc.). Of course I am all for putting them in a
extension, perhaps of GSL (the lib that AFAICT is more complete
among the Open Sources ones)
>> Some other thing, the M_*
>>constants. I always wondered why for example M_2_SQRTPI (2/sqrt(PI)) was
>>in PHP. IMO, there are only one or two essential constants to be in the
>>core: PI (of course), and (possibly) the EULER-constant.
>>What about adding PI and, possibly, EULER as constant (without the M_),
>>and deprecating those M_ constants? Or at least promote them to the
>>math-extension?
> Yeah, I'd say so... the reason? IMHO, no one was either paying
> attention to revert them, or wanted to revert someone else's commit
> (common problem ;-) -Sterling
Mea culpa, I use those for geometrical/trigonometrical conversions (along
with some PHP implemented versions of the hyperbolic funcs and the like), and
they are part of the math.h IIRC and the ISO specs for the C library.
When we get ready the (future) GSL/math extension (matrices, vectors,
yes!!!!), we could easily move them there (same for some functions).
Apropos, how would I go about implementing a new variable type, namely
complex numbers? AFAICT, we can do the vectors in GSL as linear arrays,
I got no clue as to how to translate the comple number record type into
something already defined in PHP/Zend.
(Please cc me as I usually read this via the news interface)
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