Re: [Numpy-discussion] 64bit infrastructure

2012-08-17 Thread Matthew Brett
Hi, On Fri, Aug 17, 2012 at 2:25 PM, Sayth Renshaw wrote: >> >> Hi Sayth, >> >> On Thu, Aug 16, 2012 at 8:51 PM, Sayth Renshaw >> wrote: >>> Hi >>> >>> I was just wondering if the current absence of 64bit builds was as a result >>> of an infrastructure or funding concern. >>> >>> I like many no

Re: [Numpy-discussion] 64bit infrastructure

2012-08-17 Thread Travis Oliphant
Donations to NumFOCUS would be helpful in raising money to fund the creation of 64-bit installers.It always comes down to funding, but mostly people's time is the scarce resource here. It is more difficult to build 64-bit binaries on Windows which is the real issue (not the availability

Re: [Numpy-discussion] 64bit infrastructure

2012-08-17 Thread Sayth Renshaw
> > Hi Sayth, > > On Thu, Aug 16, 2012 at 8:51 PM, Sayth Renshaw wrote: >> Hi >> >> I was just wondering if the current absence of 64bit builds was as a result >> of an infrastructure or funding concern. >> >> I like many now have only 64 bit systems and am using the unofficial builds. >> >> If it

Re: [Numpy-discussion] Correlated distributions (?)

2012-08-17 Thread Daπid
On Thu, Aug 16, 2012 at 11:14 PM, nicky van foreest wrote: > Your problem seems to resemble a Bayesian network. (The wikipedia page > on this topic is not particularly revealing in my opinion BTW.) > The courses of Sebastian Thrun on Artificial Intelligence both at Stanford or at Udacity are fre

[Numpy-discussion] Enhanced array destruction needed for C flexible numeric type

2012-08-17 Thread Lee McCuller
I've been implementing a native C++ code with all of the functionality of the Python Uncertanties package (http://packages.python.org/uncertainties/). Automatic error propagation (and differentiation) is extremely useful, but native speed is needed to use in things like function fitting. I have cr

Re: [Numpy-discussion] 64bit infrastructure

2012-08-17 Thread Ondřej Čertík
Hi Sayth, On Thu, Aug 16, 2012 at 8:51 PM, Sayth Renshaw wrote: > Hi > > I was just wondering if the current absence of 64bit builds was as a result > of an infrastructure or funding concern. > > I like many now have only 64 bit systems and am using the unofficial builds. > > If it was something

Re: [Numpy-discussion] Slow divide of int64?

2012-08-17 Thread Frédéric Bastien
Just to be sure every body know, the hardware division is always slower then the hardware multiplication. Doing division is much more complex, so it need more circuitery and can't be pipelined. So we can't reuse part of the circuitery in parallel. So hardware division will always be slower then har

Re: [Numpy-discussion] Multidimensional neighbours

2012-08-17 Thread Jose Gomez-Dans
Hi, On 16 August 2012 19:38, Sebastian Berg wrote: > Hello, > > Just to throw it in, if you do not mind useing scipy, you can use its > multidimensional correlate method instead: > Well, I don't need to count the number of neighbours as in the linked example. What I wanted to have is easy acces