Math library for Free Basic

[jdebord]

Hello,

I have begun writing a math library for Free Basic. The first version is available at:

http://www.unilim.fr/pages_perso/jean.debord/tpmath/fbmath.zip

It's quite limited at this time, but it will be updated regularly.

Best regards,

Jean Debord
Limoges, France

[Antoni Gual]

Bienvenu!

The library looks good.  No idea of the application for half of the functions but is good to have them:D

Where did you heard about FreeBasic?  Progboards forum?

[jdebord]

No idea of the application for half of the functions but is good to have them

The special functions are used in probability and statistics. I have a probability module in preparation.

Where did you heard about FreeBasic? Progboards forum?

Yes. I was looking for a free Basic compiler, without the limitations of QB. FreeBasic seemed the best choice  

[Antoni Gual]

It seems Jark's site has caused another victim....

Yes First Basic will be this year's reason for me for not starting  yet to use C seriously...It lacks only a GUI library...

[adosorken]

GUI library for freeBASIC is in the works as we speak.

[R@dioman]

Will your library be able to solve calculus equations? That would be very handy.

[jdebord]

It seems Jark's site has caused another victim

If you mean the Mandelbrot dazibao site, yes, it is in my list of favourites    But it seems that it has not been updated for a while...

Will your library be able to solve calculus equations?

This is planned. Look for the updates...

BTW, which type of equations do you wish to have first ? I plan to include linear systems, polynomials, differential equations, minimization...

[R@dioman]

the more the better. Summations would be nice

[Antoni Gual]

Last time we had news from Jark (last summer) he was very busy divorcing  :-?

[relsoft]

Dang!!! I miss Jark.  He should make a ratracer in FB.

[jdebord]

Hello,

I have just added a solver for linear equations (Gauss-Jordan method):
http://www.unilim.fr/pages_perso/jean.debord/tpmath/fbmath.zip

Solvers for non-linear equations (Newton-Raphson) will follow.

Question: is it necessary to add $DYNAMIC in a procedure which uses local dynamic arrays, to ensure that these arrays are correctly deallocated at the end of the procedure?  I have never used this directive in my QB programs, nor in this solver.

Thanks in advance,

Jean Debord

[na_th_an]

If you have dynamic arrays, and you allocate them at the beginning of a SUB procedure, you have to deallocate them at the end with ERASE.

[v3cz0r]

Deallocation is done automatically with local dynamic arrays.

But they don't need to be dynamic, keep using static arrays (DIM'ed), access is much faster, as they are allocated on stack - that is by default 1MB, what can be changed using the command-line option "-t 4096" for a 4MB stack, for example.

[na_th_an]

Oh, that's cool. QB ran out of memory if you didn't take care of deallocating Dynamic stuff... Not really sure about it, but when I added those ERASEs my games worked

[jdebord]

Deallocation is done automatically with local dynamic arrays

Thanks. So, I was right by not using $DYNAMIC  

keep using static arrays (DIM'ed), access is much faster

OK. But it is difficult in scientific applications. In most cases the array size is known only at run time.