Hi Gabor,
 
Thanks very much for your reply. I was hoping to ask a follow-up question. Can you explain why it's better to use transform than to use within? The main difference between the two functions seems to be that within allows one to use variables created in a step (e.g., A and B) to create other variables within the same step (e.g., C = A + B).
 
Thanks again.
 
Paul       
 


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