Re: [Numpy-discussion] Can I index array starting with 1?

2011-07-28 Thread Derek Homeier
On 29.07.2011, at 1:38AM, Anne Archibald wrote: > The can is open and the worms are everywhere, so: > > The big problem with one-based indexing for numpy is interpretation. > In python indexing, -1 is the last element of the array, and ranges > have a specific meaning. In a hypothetical one-based

Re: [Numpy-discussion] Can I index array starting with 1?

2011-07-28 Thread Anne Archibald
The can is open and the worms are everywhere, so: The big problem with one-based indexing for numpy is interpretation. In python indexing, -1 is the last element of the array, and ranges have a specific meaning. In a hypothetical one-based indexing scheme, would the last element be element 0? if n

Re: [Numpy-discussion] Can I index array starting with 1?

2011-07-28 Thread Stéfan van der Walt
On Thu, Jul 28, 2011 at 4:26 PM, Derek Homeier wrote: >> I guess the kind of problem I struggle with more frequently is books >> written with summations over -m to +n.  In those cases, it's often >> convenient to use the mapping function, so that I can enter the >> formulas as they occur. > > I do

Re: [Numpy-discussion] Can I index array starting with 1?

2011-07-28 Thread Derek Homeier
On 29.07.2011, at 1:19AM, Stéfan van der Walt wrote: > On Thu, Jul 28, 2011 at 4:10 PM, Anne Archibald > wrote: >> Don't forget the everything-looks-like-a-nail approach: make all your >> arrays one bigger than you need and ignore element zero. > > Hehe, why didn't I think of that :) > > I gues

Re: [Numpy-discussion] Can I index array starting with 1?

2011-07-28 Thread Stéfan van der Walt
On Thu, Jul 28, 2011 at 4:10 PM, Anne Archibald wrote: > Don't forget the everything-looks-like-a-nail approach: make all your > arrays one bigger than you need and ignore element zero. Hehe, why didn't I think of that :) I guess the kind of problem I struggle with more frequently is books writt

Re: [Numpy-discussion] Can I index array starting with 1?

2011-07-28 Thread Anne Archibald
Don't forget the everything-looks-like-a-nail approach: make all your arrays one bigger than you need and ignore element zero. Anne On 7/28/11, Stéfan van der Walt wrote: > Hi Jeremy > > On Thu, Jul 28, 2011 at 3:19 PM, Jeremy Conlin wrote: >> I have a need to index my array(s) starting with a

Re: [Numpy-discussion] Can I index array starting with 1?

2011-07-28 Thread Stéfan van der Walt
Hi Jeremy On Thu, Jul 28, 2011 at 3:19 PM, Jeremy Conlin wrote: > I have a need to index my array(s) starting with a 1 instead of a 0. > The reason for this is to be consistent with the documentation of a > format I'm accessing. I know I can just '-1' from what the > documentation says, but that

[Numpy-discussion] Can I index array starting with 1?

2011-07-28 Thread Jeremy Conlin
I have a need to index my array(s) starting with a 1 instead of a 0. The reason for this is to be consistent with the documentation of a format I'm accessing. I know I can just '-1' from what the documentation says, but that can get cumbersome. Is there a magic flag I can pass to a numpy array (ma