Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

On Sat, Oct 8, 2016 at 9:12 AM, Nathaniel Smith wrote: > On Sat, Oct 8, 2016 at 6:59 AM, Charles R Harris > wrote: > > > > > > On Sat, Oct 8, 2016 at 4:40 AM, Nathaniel Smith wrote: > >> > >> On Fri, Oct 7, 2016 at 6:12 PM, Charles R

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

On Sat, Oct 8, 2016 at 6:59 AM, Charles R Harris wrote: > > > On Sat, Oct 8, 2016 at 4:40 AM, Nathaniel Smith wrote: >> >> On Fri, Oct 7, 2016 at 6:12 PM, Charles R Harris >> wrote: >> > Hi All, >> > >> > The time for NumPy

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

Hello, I think it should be consistent with Python3. So, it should give back a float. Best regards, Krisztian On Sat, Oct 8, 2016 at 3:12 AM, Charles R Harris wrote: > Hi All, > > The time for NumPy 1.12.0 approaches and I like to have a final decision > on the

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

Sorry, I was not clear enough. I meant that the second option (always float) would be more coherent with Python3. On Oct 8, 2016 9:36 PM, "Charles R Harris" wrote: On Sat, Oct 8, 2016 at 1:31 PM, Krisztián Horváth wrote: > Hello, > > I think

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

but then that violates the numpy > principle that output dtypes should be determined entirely by input > dtypes, without peeking at the actual values. (And this rule is very > important for avoiding nasty surprises when you run your code on new > inputs.) > At division you get back an array of

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

On Sat, Oct 8, 2016 at 1:31 PM, Krisztián Horváth wrote: > Hello, > > I think it should be consistent with Python3. So, it should give back a > float. > > Best regards, > Krisztian > > Can't do that and also return integers for positive powers. It isn't possible to have

[Numpy-discussion] delete pixel from the raster image with specific range value

any idea how to delete pixel from the raster image with specific range value using numpy/scipy or gdal? for example i have a raster image with the 5 class : 1. 0-100 2. 100-200 3. 200-300 4. 300-500 5. 500-1000 and i want to delete class 1 range value or maybe i want to delete class 1,2,4,5 if

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

On Sat, Oct 8, 2016 at 3:18 PM, Krisztián Horváth wrote: > > > >> but then that violates the numpy >> principle that output dtypes should be determined entirely by input >> dtypes, without peeking at the actual values. (And this rule is very >> important for avoiding nasty

Re: [Numpy-discussion] delete pixel from the raster image with specific range value

What do you mean delete? Set to zero or NaN? You want an (N-1) dimensional array of all the acceptable values from the N dimensional array? Elliot On Oct 8, 2016 5:11 PM, "Xristos Xristoou" wrote: > any idea how to delete pixel from the raster image with > specific range

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

Well, testing under windows 64 bit, Python 3.5.2, positive powers of integers give integers and negative powers of integers give floats. So, do you want to raise an exception when taking a negative power of an element of an array of integers? Because not doing so would be inconsistent with

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

On Sat, Oct 8, 2016 at 1:40 PM, V. Armando Sole wrote: > Well, testing under windows 64 bit, Python 3.5.2, positive powers of > integers give integers and negative powers of integers give floats. So, do > you want to raise an exception when taking a negative power of an element of >

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

On Fri, Oct 7, 2016 at 6:12 PM, Charles R Harris wrote: > Hi All, > > The time for NumPy 1.12.0 approaches and I like to have a final decision on > the treatment of integers to negative integer powers with the `**` operator. > The two alternatives looked to be > > Raise

Re: [Numpy-discussion] Integers to negative integer powers, time for a decision.

On Sat, Oct 8, 2016 at 4:40 AM, Nathaniel Smith wrote: > On Fri, Oct 7, 2016 at 6:12 PM, Charles R Harris > wrote: > > Hi All, > > > > The time for NumPy 1.12.0 approaches and I like to have a final decision > on > > the treatment of integers to