I have been using the Bigmatrix addin for some matrix inverse calculations
that excel can't handle. Anyone know a way to write such an addin (it
operates from the tools menu and brings up an applet from an executable file)?

J

I checked it for you..

in the case of Bigmatrix all calculations are done with "normal" exe
files, which take commandline parameters.
Can be written in any language and then compiled. But for math
implementations I'd assume they were written in C.


The data is passed back and forth via delimited files...
and then the routine is started via a batch file.

It's a somewhat curious and crude implementation
of automation, but it's simple and it works.

keepITcool

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"?B?YmFuZ2Vjb24=?=" wrote:

I have been using the Bigmatrix addin for some matrix inverse
calculations that excel can't handle. Anyone know a way to write such
an addin (it operates from the tools menu and brings up an applet from
an executable file)?

J