Re: Count Function

*To*: mathgroup at smc.vnet.net*Subject*: [mg65527] Re: Count Function*From*: Bill Rowe <readnewsciv at earthlink.net>*Date*: Thu, 6 Apr 2006 06:52:31 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

On 4/5/06 at 6:55 AM, gregory.lypny at videotron.ca (Gregory Lypny) wrote: >The syntax will be the death of me. >Count[X[[All,14]], -9.] will tally how many elements in column 14 of >matrix X are equal to -9, but I can't for the life of me figure out >how to get how many are greater than -9. Any hint would be most >appreciated. Well if you insist on using Count Count[Sign[X[[All,14]]+9],1] will do the trick. And if you don't insist on using Count there are any of a number of ways to do this such as Length@Cases[X[[All,14]],_?(#>-9&)] -- To reply via email subtract one hundred and four