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MathGroup Archive 2007

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Re: search for an operator in an expression

  • To: mathgroup at smc.vnet.net
  • Subject: [mg78202] Re: search for an operator in an expression
  • From: dh <dh at metrohm.ch>
  • Date: Mon, 25 Jun 2007 07:10:20 -0400 (EDT)
  • References: <f5iuqu$a99$1@smc.vnet.net>


Hi Daniel,

you may use "Count". Take care to search on all "levels" and prevent 

evaluation of the operator. Asssuming your expression is in: expr, e.g.:

Count[expr, HoldPattern[ Plus[__] ], Infinity]

hope this helps, Daniel





Daniel wrote:

> Is there a way to search for an operator in a symbolic expression? My wish is to show that there is only "+" in a very large expression. Rather than showing an expression on multiple pages I would like to perform a search that shows there is only "+" between the terms. Converting to a string does not seem to work since the expression is written on multiple lines(fractions, exponents etc..)

> 

> Thanks

> 




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