Preamble:
My essential definition of "free" is as in "free speech".
The GNU definition of "free" as in "free speech" would also be nice.
Essential requirements:
A. a "sequential" as opposed to "event driven" model
I grew up under FORTRAN 7? and Dartmouth/Lawrence Livermore BASIC.
I think sequentially. VB's event driven ???? drives me up wall

B. My possible application is inherently "batch" mode.
Input data set of 4000 to 40000+ data points
Output data set from 5000-????? data points
C. *MUST* be intrinsically 32 bit
In searching the WEB I come upon XBASIC.
Is it alive and well ;?
http://www.maxreason.com/software/xbasic/xbasic05.gif
implies availability of graph plotting function.
Sample code snippet is for plotting an analytical function.
Is there provision for plotting experimental data sets?
Is there any approximation to 3D plotting?
I get the impression that XBASIC is "sequential" as opposed to
VisualBasic which is explicitly event driven?
My possible application is intrinsically "batch processing".
I'm interested in DSP "type" applications.
There are specialized languages/processors available.
*BUT* I'm interested in some prototyping work for which a variant of
BASIC would be inherently suitable.
Thank you for any comments and pointers.