Numerical methods
Hi everybody Developing my code for solving cfd problem I had to make some interpolation of another numerical experiment data So after some time I found some procedures for interpolation by spline good enough for my purposes The only problem is that I'm usin C++ and have no good mathematical libraies So when I had to make the inverse matrix I understood that the time came to find something So I got the linalg packeg from netlib to work with matricies and vectors Looking at the code I understood that it's not bad But now I have trubles with compiling it If anyone used this lib please answer me.

Re: Numerical methods
Please use MATLAB . In Matlab, the any interpolation methods and matrix operations have been available.

Re: MATLAB
Using MATLAB is not a bad idea I often use it for simple purposes But for these time I have to use interpolation in my own solver written in C (C++) so it's to tuff to my mind to use any part of MATLAB in this case

Re: Numerical methods
Is it an obligation to make to inverse matrix?
Wouldn't it be better to solve the system? If so try templates from netlib. I used it and had no difficulties compiling it. P.S. As far as I can remember, it is very time consuming to actually calculate the inverse of a matrix. 
Re: MATLAB
Take a look at the numerical receipt, it should at least has some information about matrix operation in Fortran, which is not difficult to convert to C++
Inverse big matrix costs too much of computational effort, why not try iteratively solve it... 
Re: Numerical methods
Hi Lex,
I developped some codes (C++) myself for splining, matrix stuff, etc. If you're interested, please send me an email, so I can attach these sources in a replying email. Cheers, Hans. 
Re: Inverse
Hi
Sometimes it's easier to invert matrix espesially if you have to solve several linear systems with the same matrix but different right parts Aleksei Privalov 
Re: Numerical methods
Hi Dear Alex Take a look at the MathLink feature of Mathematica version 4.0,at the addreess: www.wolfram.com I don't know but I think it mught be helpfull. Reza

All times are GMT 4. The time now is 17:07. 