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a question about ops{} command

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frank
frank 2012-5-14
Hi; I've wrote a mfile in which a symbolic variable is produced that its length is more than 25000 characters, so I broke it by using "ops" and it breaks the variable in 369 expressions. Now I need to get the derivative of the sum of these expressions. What could I do? Is there any way to save all of these expressions? Thanks

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Walter Roberson
Walter Roberson 2012-5-14
Consider using the MuPAD map() operation.
  2 个评论
frank
frank 2012-5-15
thanks for your help, how can I use this command? I used the form which was in mathworks (map(object, f, <p1, p2, , ...>, <Unsimplified>)), but it didn't work.
Walter Roberson
Walter Roberson 2012-5-15
feval(symengine, 'map', YourSymbolicExpression, 'diff', TheDerivativeVariable, 'Unsimplified')
I would, however, expect that
diff(YourSymbolicExpression, TheDerivativeVariable)
would do just as well.
The 25000 character limitation applies to *displaying* a variable, not to storing it.

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