Re: [Numpy-discussion] speeding up the following expression

2011-11-12 Thread josef . pktd
On Sat, Nov 12, 2011 at 3:36 AM, Geoffrey Zhu zyzhu2...@gmail.com wrote: Hi, I am playing with multiple ways to speed up the following expression (it is in the inner loop): C[1:(M - 1)]=(a * C[2:] + b * C[1:(M-1)] + c * C[:(M-2)]) where C is an array of about 200-300 elements, M=len(C),

Re: [Numpy-discussion] speeding up the following expression

2011-11-12 Thread Warren Weckesser
On Sat, Nov 12, 2011 at 6:43 AM, josef.p...@gmail.com wrote: On Sat, Nov 12, 2011 at 3:36 AM, Geoffrey Zhu zyzhu2...@gmail.com wrote: Hi, I am playing with multiple ways to speed up the following expression (it is in the inner loop): C[1:(M - 1)]=(a * C[2:] + b * C[1:(M-1)] + c *

Re: [Numpy-discussion] speeding up the following expression

2011-11-12 Thread josef . pktd
On Sat, Nov 12, 2011 at 10:31 AM, Warren Weckesser warren.weckes...@enthought.com wrote: On Sat, Nov 12, 2011 at 6:43 AM, josef.p...@gmail.com wrote: On Sat, Nov 12, 2011 at 3:36 AM, Geoffrey Zhu zyzhu2...@gmail.com wrote: Hi, I am playing with multiple ways to speed up the following

Re: [Numpy-discussion] speeding up the following expression

2011-11-12 Thread Warren Weckesser
On Sat, Nov 12, 2011 at 9:59 AM, josef.p...@gmail.com wrote: On Sat, Nov 12, 2011 at 10:31 AM, Warren Weckesser warren.weckes...@enthought.com wrote: On Sat, Nov 12, 2011 at 6:43 AM, josef.p...@gmail.com wrote: On Sat, Nov 12, 2011 at 3:36 AM, Geoffrey Zhu zyzhu2...@gmail.com wrote:

Re: [Numpy-discussion] speeding up the following expression

2011-11-12 Thread josef . pktd
On Sat, Nov 12, 2011 at 11:32 AM, Warren Weckesser warren.weckes...@enthought.com wrote: On Sat, Nov 12, 2011 at 9:59 AM, josef.p...@gmail.com wrote: On Sat, Nov 12, 2011 at 10:31 AM, Warren Weckesser warren.weckes...@enthought.com wrote: On Sat, Nov 12, 2011 at 6:43 AM,

Re: [Numpy-discussion] speeding up the following expression

2011-11-12 Thread Warren Weckesser
On Sat, Nov 12, 2011 at 11:16 AM, josef.p...@gmail.com wrote: On Sat, Nov 12, 2011 at 11:32 AM, Warren Weckesser warren.weckes...@enthought.com wrote: On Sat, Nov 12, 2011 at 9:59 AM, josef.p...@gmail.com wrote: On Sat, Nov 12, 2011 at 10:31 AM, Warren Weckesser

Re: [Numpy-discussion] speeding up the following expression

2011-11-12 Thread Geoffrey Zhu
Hi Warren, On Sat, Nov 12, 2011 at 9:31 AM, Warren Weckesser warren.weckes...@enthought.com wrote: On Sat, Nov 12, 2011 at 6:43 AM, josef.p...@gmail.com wrote: On Sat, Nov 12, 2011 at 3:36 AM, Geoffrey Zhu zyzhu2...@gmail.com wrote: Hi, I am playing with multiple ways to speed up the