I got a lof of help from the experts in this forum. I resitsted to send a thank
you reply for fearing spaming the forum. This time I really want to let the
people know that I am really appreciate the great help I got.
Please let me know if a simple thank you message is not appropriate in this
forum.
Numpy makes Pyhton a great tools for processing signal.
Thank you very much.
Frank > Date: Mon, 8 Dec 2008 11:30:31 -0600> From: [EMAIL PROTECTED]> To:
numpy-discussion@scipy.org> Subject: Re: [Numpy-discussion] how to create a
matrix based on a vector?> > On Mon, Dec 8, 2008 at 11:27, frank wang <[EMAIL
PROTECTED]> wrote:> > Hi,> >> > I want to create a matrix based on a vector. It
is difficult to describe the> > issue for me in english. Here is an example.>
>> > Suppose I have an array([3, 6, 8, 12]), I want to create a range based on>
> each element. In this exampe, let us say want to create 4 number with step> >
2, so I will have> >> > [3, 6, 8, 12> > 5, 8, 10,14> > 7, 10,12,16> > 9,
12,14,18]> >> > It is a 4 by 4 maxtric in this example. My original array is
quite large.> > but the range I want to create around the number is not big, it
is about 30.> >> > Does anyone know how to do this efficiently?> > In [1]: from
numpy import *> > In [2]: a = array([3, 6, 8, 12])> > In [4]: b = arange(0,
4*2, 2)[:,newaxis]> > In [5]: a+b> Out[5]:> array([[ 3, 6, 8, 12],> [ 5, 8, 10,
14],> [ 7, 10, 12, 16],> [ 9, 12, 14, 18]])> > -- > Robert Kern> > "I have come
to believe that the whole world is an enigma, a harmless> enigma that is made
terrible by our own mad attempt to interpret it as> though it had an underlying
truth."> -- Umberto Eco> _______________________________________________>
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