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How build a ?TestFuntion that applied to a list gives only the elements that are function of x

• To: mathgroup at smc.vnet.net
• Subject: [mg32995] How build a ?TestFuntion that applied to a list gives only the elements that are function of x
• From: "J. Guillermo Sanchez" <guillerm at usal.es>
• Date: Sat, 23 Feb 2002 02:38:16 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

How build a ?TestFuntion that applied to a list give only the elements 
that are function of x

Example:

In[]:= {Sin[a x], b x, t, c r}/.?TestFuntion

gives

Out[] = {Sin[a x], b x}

Thanks

Guillermo Sanchez

• Follow-Ups:
  • RE: How build a ?TestFuntion that applied to a list gives only the elements that are function of x
    • From: "Higinio Ramos" <higra@usal.es>
  • Re: How build a ?TestFuntion that applied to a list gives onlythe elements that are function of x
    • From: Tomas Garza <tgarza01@prodigy.net.mx>