Thanks everyone, I have something working using FFTW. My first program
looks ok. It takes the IFFT ( FFT (x,N) , N). My second program is,
shall we say, a work in progress. It runs, but the output is not as
expected. C is pretty ugly. My code is even uglier.
As for parallel processing, I
You might consider using Perl's Math::FFTW module for your problem:
http://steffen-mueller.net/modules/Math-FFTW/
Another module that you might find to be useful is Perl's
Math::Complex module:
http://search.cpan.org/~nwclark/perl/lib/Math/Complex.pm
Or, depending on the size and scope of
JerryF wrote:
>There is a bug in your code:
>c = (a,b); // form the complex number
>This is not initialzing c. It is assigning a to c.
Oh. Duh. He's right.
Some variations:
#include
#include
#include
using namespace std;
int main(int argc, char *argv[])
{
double a, b;
a = 1.1
On Sun, 06 Jan 2008 16:47:23 -0500
Bruce Labitt <[EMAIL PROTECTED]> wrote:
> Nope, I'm using Dev-C++ which is based on the MinGW compiler. (gcc)
>
> I'm just a bit frustrated that I can't even form a single complex number
> and print it out. :(
>
> I've got a simpler scrap of code that doesn't
(sigh!) Never mind - I should have actually
compiled that program before responding - it
doesn't work either. I'll poke at it after
I finish some errands. Yeesh! That "g++ -E"
trick yields approx 30,000 lines of code after
all the #includes and macro expansions...
__
I did find a solution. Not online though... From brute force try
anything...
This snippet does work. However, as noted in the code, even though the
standard says it will work - it didn't...
#include
#include
#include
using namespace std;
using std::complex;
int main(int argc, char *argv[]
Um, I think you're basically OK and only need to
extract the real and imaginart portions properly,
maybe something like this:
#include
#include
#include
using namespace std;
int main(int argc, char *argv[])
{
double a, b;
complex c;
a = 1.0;// a is the real part
b = 1.0;
>> What's the compiler version?
>
> I can tell from the directory path in his original post that
> it's almost certainly some flavor of Microsoft Visual C++.
Yah, I also noticed that pathname but thought it possible he
was maybe using some flavor of something like Cygwin.
[...]
>> Also
Nope, I'm using Dev-C++ which is based on the MinGW compiler. (gcc)
I'm just a bit frustrated that I can't even form a single complex number
and print it out. :(
I've got a simpler scrap of code that doesn't work either. ;)
compiled with c++ compiler...
#include
#include
#include
using name
On Jan 6, 2008 2:05 PM, Michael ODonnell <[EMAIL PROTECTED]> wrote:
> What's the compiler version?
I can tell from the directory path in his original post that it's
almost certainly some flavor of Microsoft Visual C++.
FWIW, Microsoft has some (limited) docs online:
http://msdn2.microsoft.co
Bruce Labitt wrote:
> Thanks, Kent.
>
> It actually did help. Maybe I'll show up to the January PySig and annoy
> people there...
Or January MerriLUG where I am presenting on Python.
Do you know if Python (scientific/scipy) is available
> for the CELL processor, aka PS3?
This document sugge
Also, if you post your code here (trimmed down so it's just
enough to demo the problem) some of us might be better able
to offer an analysis.
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> I'm not sure where to find out about complex number support in C
> (or C++). Most of the pages I've googled so far haven't been
> too helpful.
What's the compiler version? Assuming gcc or g++ try invoking
with only the -v option to learn the version.
Try adding the -E option and then lookin
Thanks, Kent.
It actually did help. Maybe I'll show up to the January PySig and annoy
people there... Do you know if Python (scientific/scipy) is available
for the CELL processor, aka PS3? I've got a massively parallel problem
I need to solve... My initial look at python was favorable - it
I was going to try casting next, but I didn't understand why the
expression would automatically be of that type. "I" is type double
_Complex, I think. So why isn't the expression on the RHS already
double _Complex? I'm not sure where to find out about complex number
support in C (or C++). M
The problem it's complaining about is that mymean and mystdev are
variables of type "double" and gaussrand() returns a "double"... and
you're trying to assign the result to g[ii] which is type "double
_Complex". You could try casting the result to "double _Complex" like
this:
g[ii] = (double _Com
Bruce Labitt wrote:
> Hopefully a simple question. I'm trying to write a C program that uses
> complex numbers.
> Hopefully someone can point me in the write direction. TIA.
If you don't have a specific requirement for C, you might consider
learning Python instead.
> python.org :-)
Python
Hopefully a simple question. I'm trying to write a C program that uses
complex numbers. (I'm a "C" illiterate. Just wrote my second
program...) Reading the header file complex.h hasn't helped too much.
Can someone give me a hint on how to "fix" this? Most of the references
on C are *anci
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