David Isaac wrote:
> 2. Is this a good argmax (as long as I know the iterable is finite)?
> def argmax(iterable): return max(izip( iterable, count() ))[1]
Other than the subtle difference that Peter Otten pointed out, that's a
good method.
However if the iterable is a list, it's cleaner (and more
David Isaac wrote:
> 2. Is this a good argmax (as long as I know the iterable is finite)?
> def argmax(iterable): return max(izip( iterable, count() ))[1]
In Python 2.5:
Python 2.5a2 (trunk:46491M, May 27 2006, 14:43:55) [MSC v.1310 32 bit
(Intel)] on win32
>>> iterable = [5, 8, 2, 11, 6]
>>>
Thanks for all the replies.
A couple of comments.
1. I think the usefulness of an argmax built-in can be assessed
by looking at other languages (and e.g. at numpy). So I do not
buy the "not needed" argument as presented. More like "haven't
got around to it," I'm thinking.
2. The particular use
David Isaac wrote:
> 2. Is this a good argmax (as long as I know the iterable is finite)?
> def argmax(iterable): return max(izip( iterable, count() ))[1]
There's a subtle difference to the builtin: argmax() gives you the (index of
the) last maximum while max() returns the (value of the) first ma
Le 01-06-2006, David <[EMAIL PROTECTED]> nous disait:
> 1. Why is there no argmax built-in?
> (This would return the index of the largest element in a sequence.)
You'll get argmin and argmax in Numeric and its descendants (numarray
and numpy).
--
Alexandre Fayolle
David Isaac wrote:
> 1. Why is there no argmax built-in?
> (This would return the index of the largest element in a sequence.)
I guess because it's not used frequently enough. I've needed
argmax/argmin more than once though, so I would welcome them as
builtins.
> 2. Is this a good argmax (as lon
"David Isaac" <[EMAIL PROTECTED]> wrote:
> 1. Why is there no argmax built-in?
> (This would return the index of the largest element in a
> sequence.)
>
> 2. Is this a good argmax (as long as I know the iterable is
> finite)? def argmax(iterable): return max(izip( iterable, count()
> ))[1]
>
David Isaac wrote:
> 1. Why is there no argmax built-in?
> (This would return the index of the largest element in a sequence.)
Probably there isn't a built-in because it isn't a commonly needed
function.
What is your use-case for argmax? If for example you want to repeatedly
remove the largest
