a question about ops{} command

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

Answer 1

[Walter Roberson]

Consider using the MuPAD map() operation.

[frank]

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]

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.