Re: Logical comparisons of items in a two lists
- To: mathgroup at smc.vnet.net
- Subject: [mg75463] Re: [mg75446] Logical comparisons of items in a two lists
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Wed, 2 May 2007 03:45:56 -0400 (EDT)
- Reply-to: hanlonr at cox.net
a=Table[Random[],{10}];
b=Table[Random[],{10}];
Count[Thread[a>b],True]
8
Total[Boole[Thread[a>b]]]
8
Length[Pick[a, Thread[a>b]]]
8
Bob Hanlon
---- "actuary at mchsi.com" <actuary at mchsi.com> wrote:
> Hello:
>
> I have two lists of real numbers, a & b. I want two compare
> individual items in one list to the corresponding items in the other
> list. For example Is a[[1]] > b[[1]]. At the end of the comparisons,
> I want to count the "Trues". I know how to do this use a "Table"
> statement and a "Count" statement. Is there a quicker, more efficient
> way of counting the number of "Trues".
>
> Thanks
>
> Larry
>
>