Dear all,
Thank you for your replies!
Regarding Julia - it seems to be interesting, but - it is too
fresh, and from what I understood, it is not compiled. I think D
language would be more interesting for me and suitable for my
needs (scientific computing).
Yes, numpy/scipy is OK, but since I have now some time I would
like to learn one compiled language which is more close to the
hardware,
"I have done some linear algebra in D. If you are comfortable
calling C functions, you can easily call into existing solutions,
because it is trivial to call into C from D."
This is very interesting since as you know lots of code is
written in c. GSL is a good example. The only problem is how to
use it. The thing is that i don't know c, but the question is
whether I really need to be skilled in c to be able to call c
functions. My gut feeling is that no, I don't need to be skilled.
I have installed gsl on my computer. But what I need is a good
example of a code/codes on how to call this library from d
programming language. E.g. I have tried to use gsl. I have
written a code in c (simple.c):
-------
#include <stdio.h>
#include <gsl/gsl_sf_bessel.h>
double fun(double x)
//main (void)
{
// x = 5.0;
double y = gsl_sf_bessel_J0 (x);
// printf ("J0(%g) = %.18e\n", x, y);
return y;
}
----------------
Also, I have written a di file (simple.di):
----------------
extern (C):
double fun(double);
----------------
And finally, d code (simple.d):
------------------
import std.stdio, std.string, std.array;
import std.conv;
import std.stdio;
import simple;
void main(){
writeln( fun(10.0) );
}
------------------------------------
Unfortunately, when I compile it it says:
dmd simple.d simple.o
simple.d(8): Error: undefined identifier fun
Could one provide a working clear example how to use gsl in D?
I have tried SciD and it apparently works, though I did not test
it so far. I think a tutorial on how to use D in scientific
programming would be very appreciated and could attract more
people to D.
PS Thank all of you for helping.
I use Gretl
http://gretl.sourceforge.net/ because it offers a convenient
interface to commonly used BLAS and LAPACK functionality. GSL is
another good choice https://www.gnu.org/software/gsl/. This has
worked well for me because I am using D as a drop-in replacement
for C."
On Thursday, 17 October 2013 at 20:31:38 UTC, Yura wrote:
Dear D programmers,
I am very new to D programming language. I just started to
learn it as an alternative to python since the latter sometimes
is too slow. My question is whether there some simple ways to
solve linear algebra problems in D programming language? E.g.
matrix multiplication, diagonalization, SVD decomposition? If
there is something, I would definitely stick to D programming
language in my projects.
PS I am not a proffesinal programmer and I am sorry if this
question has already been discussed.
Thaks in advance!
