Removing exponents from a sysm class term

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ross montgomery
ross montgomery 2012-10-30
I am interested in removing the exponents from a syms class object. For instance, i wish the following expression,
answer = x^2 + y^2*z^2
to instead take the form of,
answer = x + y*z
I was wondering if there was a shorter way to do this other than writing my own muPad procedure.
Thanks in advance.
Ross Montgomery

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采纳的回答

Alexander
Alexander 2012-10-31
You can use evalin to do a substitution of the powers inside MuPAD:
>> evalin(symengine, ['subs(', char(answer) ,', hold(_power) = (x->x), EvalChanges)'])
ans =
x + y*z
  1 个评论
ross montgomery
ross montgomery 2012-10-31
Hi Alexander,
This worked great and is exaclty what i was looking for.
Many thanks.
Ross

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更多回答（1 个）

Walter Roberson
Walter Roberson 2012-10-30
You might be able to do something using MuPad's map() and match(); http://www.mathworks.com/help/symbolic/mupad_ref/match.html
Side note: Extended Symbolic Math Toolbox only applied to the Maple-based Symbolic Toolbox which predated the MuPAD based Symbolic Math Toolbox.
  1 个评论
ross montgomery
ross montgomery 2012-10-31
Thanks for your response Walter and i'll stop tagging "Extended Symbolic Math Toolbox" on all of these problems.
Thanks again.
Ross

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