Hi,
I have a big 2 column data file where the data are repeated either 5 or 6
times. Are there any quick way to remove the duplicated data?
Thanks
Frank
_
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Hi,
I have just noticed that I did not change the title of my question. So I resend
it out. Sorry for the mistake. Here is my question.
I have a big 2 column data file where the data are repeated either 5 or 6
times. Are there any quick way to remove the duplicated data?
Thanks
2009 00:15:48 -0600 From: robert.k...@gmail.com To:
numpy-discussion@scipy.org Subject: Re: [Numpy-discussion] help on fast
slicing on a grid On Thu, Jan 29, 2009 at 00:09, frank wang
f...@hotmail.com wrote: Here is the for loop that I am think about. Also,
I do not know whether the where
Hi, Bob,
Thanks. This solution works great. It really helps me a lot.
Frank Date: Fri, 30 Jan 2009 23:08:35 -0600 From: robert.k...@gmail.com To:
numpy-discussion@scipy.org Subject: Re: [Numpy-discussion] help on fast
slicing on a grid On Fri, Jan 30, 2009 at 22:41, frank wang
f
Hi,
I have to buidl a grid with 256 point by the command:
a = arange(-15,16,2)
L = len(a)
cnstl = a.reshape(L,1)+1j*a
My problem is that I have a big data array that contains the data round the
points in cnstl. I want to slice the point to the closest cnstl point and also
compute the error.
...@gmail.com To:
numpy-discussion@scipy.org Subject: Re: [Numpy-discussion] help on fast
slicing on a grid On Wed, Jan 28, 2009 at 23:52, frank wang
f...@hotmail.com wrote: Hi, I have to buidl a grid with 256
point by the command: a = arange(-15,16,2) L = len(a) cnstl =
a.reshape(L,1
on fast
slicing on a grid On Thu, Jan 29, 2009 at 00:09, frank wang
f...@hotmail.com wrote: Here is the for loop that I am think about. Also,
I do not know whether the where commands can handle the complicated logic.
The where command basically find the data in the square around the point
? On Mon, Dec 8, 2008 at 19:15, frank wang
[EMAIL PROTECTED] wrote: Hi, I have a program with some variables
consume a lot of memory. The first time I run it, it is fine. The second
time I run it, I will get MemoryError. If I close the ipython and reopen it
again, then I can run the program
On my two systems with Intel Core2 DUO, finfo(float128) gives me the nameerro,
NameError: name 'float128' is not defined. Why?
Thanks
Frank Date: Tue, 9 Dec 2008 21:10:32 -0600 From: [EMAIL PROTECTED] To:
numpy-discussion@scipy.org Subject: Re: [Numpy-discussion] Importance of order
when
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
, 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
Hi,
I have a program with some variables consume a lot of memory. The first time I
run it, it is fine. The second time I run it, I will get MemoryError. If I
close the ipython and reopen it again, then I can run the program once. I am
looking for a command to delete the intermediate variable
Hi,
I need to convolve a 1d filter with 8 coefficients with a 2d array of the shape
(6,7). I can use convolve to perform the operation for each row. This will
involve a for loop with a counter 6. I wonder there is
an fast way to do this in numpy without using for loop. Does anyone know how
@scipy.org Subject: Re: [Numpy-discussion] fast way to
convolve a 2d array with 1d filter Hi Frank 2008/12/2 frank wang
[EMAIL PROTECTED]: I need to convolve a 1d filter with 8 coefficients with
a 2d array of the shape (6,7). I can use convolve to perform the operation
for each row
Hi,
My numpy is 1.2.1 and python is 2.5.2.
In python, I did:
from numpy import *
x=array([1,2,3])
z=x.fill(x)
print z
None
z should be filled with zero. I do not knwo why I got None. Can anyone help me
on this?
Thanks
Frank
Hi,
I have a large array and I want to convert it into a binary array. For exampe,
y=array([1,2,3]), after the convertion I want the result
array([0,0,0,1,0,0,1,0,0,0,1,1]). Each digit is converted into 4 bits in this
example. In my real problem I want to convert each digit to 8 bits. My
Hi,
From www.scipy.org web site, I tried to print the Numpy Example List with
Doc. Even though I can read the document on the computer, but when I printed,
except of the first few pages, all pages printed empty.
Does anyone know the reason?
Thanks
Frank
Hi,
Can you provide a working example to build Numpy with MKL in window and linux?
The reason I am thinking to build the system is that I need to make the speed
match with matlab.
Thanks
frank Date: Thu, 13 Nov 2008 11:39:42 +0100 From: [EMAIL PROTECTED] To:
numpy-discussion@scipy.org
Hi,
I need to perform iir filter operation using numpy and could not googled any
useful info for this. Are there filter operation similar the matlab filter
funciton in Numpy?
Thanks
Frank
_
Color coding for safety: Windows
Hi,
In my work, I want to implement a fir filter with an input array. Since
performing the filter on each input sample is slow, are there fast way to
perform the fir filter operation? Are there ways to convert input into an
array and perform the array multipication?
Thanks
Frank
to speed up
the python code On Fri, Oct 24, 2008 at 11:30, frank wang [EMAIL
PROTECTED] wrote: Hi, I have to send this request second time since
my first message contains the attached data file which is too big and was
blocked by the system. So this time I will not attach the data file. I
have
Hi,
I have to send this request second time since my first message contains the
attached data file which is too big and was blocked by the system. So this time
I will not attach the data file.
I have converted a matlab function to python using numpy. both matlab and
python run slow. I
' with
line.startswith('1 1'), the pure python version goes up to 1.8 sec...
Isn't this a bit weird, i'd think startswith() should be faster...
Chris On Wed, Oct 01, 2008 at 07:27:27PM -0600, frank wang wrote:
Hi,I have a large data file which contains 2 columns of data. The two
Hi,
I have a large data file which contains 2 columns of data. The two columns only
have zero and one. Now I want to cound how many one in between if both columns
are one. For example, if my data is:
1 0
0 0
1 1
0 0
0 1x
0 1x
0 0
0 1x
1 1
0 0
0 1x
0 1x
1 1
Then
-discussion@scipy.org Subject: Re: [Numpy-discussion] loadtxt error
2008/9/24 frank wang [EMAIL PROTECTED]: Thank you very much for all of
you. I have downloaded the binary version 1.2rc and it fixed the problem.
My special thanks to the person who created the window binary version
)
It does not return any result.
Frank Date: Mon, 29 Sep 2008 16:48:23 -0500 From: [EMAIL PROTECTED] To:
numpy-discussion@scipy.org Subject: Re: [Numpy-discussion] Are there command
similar as Matlab find command? frank wang wrote: Hi,I am trying
to find a command in numpy or python
appreciate the help I got from the forum.
Frank Date: Mon, 29 Sep 2008 20:22:14 -0500 From: [EMAIL PROTECTED] To:
numpy-discussion@scipy.org Subject: Re: [Numpy-discussion] Are there command
similar as Matlab find command? On Mon, Sep 29, 2008 at 20:16, frank wang
[EMAIL PROTECTED] wrote
Thank you very much for all of you. I have downloaded the binary version 1.2rc
and it fixed the problem.
My special thanks to the person who created the window binary version for users
who do not know or do not have the capacity to build the numpy from source.
Frank Date: Wed, 24 Sep
Hi, All,
I am using ipython with --pylab flag. ipython loads the numpy into the
workspace, so I do not know abs is from python or numpy. The weird thing is if
I execute the code line by line, I do not have any speed problem. But when I
combine them together into one command, it slowdonws the
been fixed in the trunk a couple of weeks ago. Cheers, David
On Mon, Sep 22, 2008 at 8:10 PM, Pierre GM [EMAIL PROTECTED] wrote:
On Monday 22 September 2008 19:56:47 frank wang wrote: This error is caused
that the usecols is a tuple and it does not have find command. I do not know
how to fix
(i)340 converters[i] =
conv
Thanks
Frank From: [EMAIL PROTECTED] To: numpy-discussion@scipy.org Date: Mon, 22
Sep 2008 20:10:11 -0400 Subject: Re: [Numpy-discussion] loadtxt error On
Monday 22 September 2008 19:56:47 frank wang wrote: This error is caused
that the usecols
Hi, All,
I am struggling to make the loadtxt works. In my file, I have several colunms
of data, say I have two. When I use the following command to load the data,
fid=loadtxt('filename.csv',comments='',dtype='|S4',converters={0:lambda
s:int(s,16)})
It will load an array has two columns.
Hi, All,
I have found a bug in the loadtxt function. Here is the example. The file name
is test.txt and contains:
Thist is test
3FF 3fE
3Ef 3e8
3Df 3d9
3cF 3c7
In the Python 2.5.2, I type:
test=loadtxt('test.txt',comments='',dtype='string',converters={0:lambda
s:int(s,16)})
test will
) to decimal? frank wang wrote:
Hi, All,I have found a bug in the loadtxt
function. Here is the example. The file name is test.txt and contains:
Thist is test 3FF 3fE 3Ef 3e8 3Df 3d9
3cF 3c7In the Python 2.5.2, I type:
test
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