[kepler-users] RExpression Bug?

[Tom Parris]

Dear Keplerites,

I believe I have stumbled across a bug in the RExpression actor.  I am using
the 1.0.x developer version from svn in Windows XP (x86).

The attached workflow should demonstrate two bugs.

1. Matrices get scrambled by RExpression.  The "Make a Matrix" actor is a
simple python script that creates an nrow x ncol matrix where M[i,j] = i+j
(with subscripts starting at 0).  The result is displayed properly by
MatrixViewer and MatrixViewer2.  However, the matrix is scrambled inside R
(see Display and ImageJ).  It looks like the row and column subscripting is
reversed.

2. The workflow executes the first time the run button is pressed, but
produces a type error the second time it is pressed.  Reloading the workflow
solves the problem (for one run iteration).

With regards,
Tom

p.s.  There is also a serious performance issue.  Try changing the nrow and
ncol constants from their current values of 5 and 10 to something like 100
and 200.  Even with the extra conversions from binary to text and back, it
takes way too long.
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