Re: Import variable and data

*To*: mathgroup at smc.vnet.net*Subject*: [mg32730] Re: Import variable and data*From*: lalu_bhatt at yahoo.com (Bhuvanesh)*Date*: Thu, 7 Feb 2002 05:10:34 -0500 (EST)*References*: <a3qs8q$2c4$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

"Mark Van De Vyver" <mvdv at bigfoot.com> wrote: > inputData=Import[input.txt,"Table"] > {{a,b,c,d},{1,23,45,678}} > > This all works OK. > Head[..] indicates the a,b,c and d are strings, which is fine, because > ToExpression[..] changes them to symbols. What I'd like to do is use > inputData to do the following: > > {a,b,c,d}={1,23,45,678} > > However, if I try > > ToExpression[ inputData[[1]] ] = inputData[[2]] > > I get an error: > > Set::write: Tag ToExpression in ToExpression[a] is Protected. Use Evaluate: Evaluate[ToExpression[inputData[[1]]]] = inputData[[2]] This way, it will evaluate the left-hand expression before doing the assignment. -- Bhuvanesh, Wolfram Research.