RE: [Plplot-devel] Possible bug in matrix initialization

[Geoffrey F. <fu...@ga...>]

Alan W. Irwin writes:
 > I have been struggling with resetting the cmap1 to default values for tcl.
 > Turns out my problems were due to the following construct which I thought
 > should work to initialize the matrix.
 > 
 > matrix l f 6  = {0.5, $midpt, $vertex, $vertex, $midpt, 0.5}
 > 
 > This silently fails by sticking zeroes everywhere there is a variable
 > reference (i.e., all the interior points) even though the variables have
 > previously been set.  Isn't this a bug? Shouldn't the variables just be
 > replaced by their values?
 > 
 > I worked around this by using
 > 
 > l 1 = $midpt
 > l 2 = $vertex
 > 
 > etc., in x08.tcl,
 > 
 > but I don't think this workaround should be necessary.

:-).  It's called "Tcl" because you're supposed to giggle every time
it annoys you.

Braces protect against variable interpolation.

There's probably a way to get what you want using eval or list or
something.  

-- 
Geoffrey Furnish         fu...@ga...