[ILUG] Matrix math libraries?

[John Gay]

Some time ago, Mike said:


Does anyone know of any good math libraries for doing some basic
matrix math that can be linked to some C programs?

Specifically functions that will give the inverse, transpose and product
of one or more matrices.

Thanks,
Mike

And I replied thus:
I was looking for similar tools some time ago and I came across this:

ftp://ftp.cdrom.com/pub/algorithms/c/matrx042/

I don't know if it will cover everything you are looking for, but I found the
code to be easy to follow, and I'm not a programmer, yet! It is very basic, and
hasn't been updated in a while, but if you're looking for example type code, I
found this to be quite helpful. If you want just directly plug-in type code,
then lapack may be more suited to you needs.

Cheers,

     John Gay

I am now currently re-visiting a multi-dimensional programme I originally wrote
in QBasic quite a few years ago. However, I am only just learning C. I've bought
quite a few books on the subject over the years. My main questions are:

matrix042 toolkit provides more functionality than I need. I should be able to
just include the specific files I need, right? I only need to create, edit and
multiply matrixes.

Will I be re-inventing the wheel by using this toolkit rather than something
that might already be installed in my Linux box? I kinda like the simplicity of
this toolkit, but I don't want to create more work than I need to.

can anyone recommend a simple graphics tool? I only need to be able to draw
lines between points in colours compatible with the Red/Blue 3D glasses. My
basic program could draw 4 and 5 dimensional cubes, project them to 3-D and
rotate them in Red/Blue 3-D on the screen. I am hoping to do the same with this
one.

I have found a project on the web that aims for exactly what I am trying to do,
but that project has died, and goes way beyond my simple ability. The sources
are provided, but one of the files is missing, so it won't compile. It also
outputs in PS, rather than graphics.

Cheers,

     John Gay