Re: String to List

*To*: mathgroup at smc.vnet.net*Subject*: [mg76989] Re: String to List*From*: David Bailey <dave at Remove_Thisdbailey.co.uk>*Date*: Thu, 31 May 2007 03:26:07 -0400 (EDT)*References*: <f3jigv$dpo$1@smc.vnet.net>

King, Peter R wrote: > I have a string which in general looks something like > > a="{x,16,x,1T,x}" > > In other words it looks like a list with a mixture of characters and > numbers and so on. I want to pick out the individual elements of this > (using the commas as delimiters) > > Clearly a[[1]] etc doesn't mean anything > > I can do b=ToExpression[a] and I get a list so b[[1]] is x and > b[[2]]=16 (that is the number sixteen but I can convert this back into = > a > string with ToString. The problem is b[[4]] which ToExpression turns > into T as it thinks I mean 1 x T. > > So I would appreciate help with either > > i) converting my original string to a list as I would like > > Or > > Ii) stopping the evaluation of 1T into T so that I can get the string 1T > > (The only thought I had was to step through the original string > character by character telling it to put the characters into different > elements of a list each time I pass a comma, but this looked a bit > cumbersome). > > Many thanks, > > Peter King > StringSplit will break your string into a list of strings: StringSplit["{x,16,x,1T,x}", ","] You can then access the elements of the list in the ordinary way. David Bailey http://www.dbaileyconsultancy.co.uk