Re: Using Select with arrays? (Relative newbie)

*To*: mathgroup at smc.vnet.net*Subject*: [mg54243] Re: Using Select with arrays? (Relative newbie)*From*: David Bailey <dave at Remove_Thisdbailey.co.uk>*Date*: Mon, 14 Feb 2005 21:50:36 -0500 (EST)*References*: <cup5ip$dsr$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, Select selects using a boolean function, Cases (which is what you want here) selects by pattern: c=5; d=6; data={ {1,1,"string1",c,d} , {1,2,"string2",c,d} , {1,3,"string3",c,d} , {1,4,"string4",c,d} , {2,1,"string1",c,d} , {2,2,"string2",c,d} , {3,1,"string3",c,d}, {4,1,"string2",c,d} , {4,2,"string4",c,d}}; Cases[data, {1, _Integer, _String, _Integer, _Integer}] {{1, 1, string1, 5, 4}, {1, 2, string2, 5, 4}, { 1, 3, string3, 5, 4}, {1, 4, string4, 5, 4}} Note - as written, your strings were not quoted and there were some commas missing - I guess just typos. Also, c and d required values - otherwise the pattern _Integer will not match. If this is a problem, just use the pattern _ in those positions, and it will match anything. David Bailey dbaileyconsultancy.co.uk