Applying a set of rules to a List
- To: mathgroup at yoda.physics.unc.edu
- Subject: Applying a set of rules to a List
- From: "Anthony Varghese" <avarg at s1.arc.umn.edu>
- Date: Mon, 25 Jan 93 19:21:15 CST
I would like to apply a set of rules to all the elements of a list and
I've tried a number of things with no success.
What I have is a set of equations in which certain variables are to be
held at fixed values. The equations are stored as a list, say, oldEqns.
The substitution rules are stored in a variable called fpRules.
I need to get a new set of equations obtained by ReplaceAll'ing the
old eqns with the fpRules. Here is one attempt:
applyRules[item_] := ReplaceAll[item, fpRules]
newEqns = Map[ applyRules, oldEqns ]
Unfortunately this did not work; I don't see any difference between
oldEqns and newEqns even though I KNOW there are places where the rules
can be applied.
Anyone see the problem?
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