David, To use jqt to run your lab I found instructions at the following link which may be helpful to others.
http://code.jsoftware.com/wiki/Labs/Basic_Usage As clear as you Lab is, it is really dense stuff that requires more attention than I can give now because I cannot think of an immediate need for such interpolation. Thanks for the examples. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
