Re: ordering a large matrix and referring to the named rows later

*To*: mathgroup at smc.vnet.net*Subject*: [mg75411] Re: ordering a large matrix and referring to the named rows later*From*: SzH <szhorvat-nospamplease at gmail.com>*Date*: Sat, 28 Apr 2007 06:04:22 -0400 (EDT)*Organization*: University of Bergen*References*: <f0n8n0$s99$1@smc.vnet.net>

newbie wrote: > Hi, > I have a large matrix {5165, 26}, the first row and first 8 columns > identify the values in the matrix. I need to be able to sort the data > without losing the ability to reference the labels. Any ideas? > Thank you very much for any help! > > I am not sure I understand you question correctly, but I hope this helps: You have a list of lists, so you need a comparison function that works with lists as arguments. E.g. to use the 9th column as a key for sorting, try Sort[data, #1[[9]] < #2[[9]] & ] Szabolcs