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Re: Replacement question

  • To: mathgroup at
  • Subject: [mg74208] Re: Replacement question
  • From: dh <dh at>
  • Date: Wed, 14 Mar 2007 03:52:44 -0500 (EST)
  • References: <et5nnh$jhk$>

Hi Brian,

this works, but what is matched is the FullForm and not what you see. 

Therefore, look at your expression using FullForm.


Brian Beckage wrote:

> I apologize for this very basic question.  I understand how to use /. 

> {} to replace a  variable with a more complex expression, e.g., x-> 

> y+z.  Can one move in the opposite direction to replace all 

> occurrences of y+z with x?   myExpression/.{y+z->x} does not seem to 

> work.


> Thank you for your help,

> Brian




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