Re: Symbols and Lists
- To: mathgroup at smc.vnet.net
- Subject: [mg39859] Re: [mg39832] Symbols and Lists
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Sun, 9 Mar 2003 05:26:42 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Evaluate[ss[[3]]] = dd[[4]] will do what you want. Andrzej Kozlowski Yokohama, Japan http://www.mimuw.edu.pl/~akoz/ http://platon.c.u-tokyo.ac.jp/andrzej/ On Saturday, March 8, 2003, at 04:49 pm, Goyder Dr HGD wrote: > Dear MathGroup, > > I am doing something much more complicated but this trivial example > expresses my difficulty. > > If I have a list of symbols and a list of data such as > > ss = {a, b, c, d, e} > > dd = {1, 5, {3, 4}, 7, abc, {0.1, 0.001}, 3.1415} > > how do I take a symbol from the list ss and associated it with data > from the > list dd? > > A wrong attempt is to try > > ss[[3]] = dd[[4]] > > This replaces element 3 in ss with element 4 from dd. > > What I need is an assignment so that, in this case, the symbol c is > associated with the data. Equivalent to writing > > c = dd[[4]] > > so that c could then be used in subsequent expressions and the list ss > is > unchanged. > > Note that this is a trivial example for pedagogic purposes - I can't > do the > simple assignment in my actual case. > > Thanks > > Hugh Goyder > > > >