Re: eliminate values while caculating Mean[data]
- To: mathgroup at smc.vnet.net
- Subject: [mg91964] Re: eliminate values while caculating Mean[data]
- From: Szabolcs Horvát <szhorvat at gmail.com>
- Date: Mon, 15 Sep 2008 03:41:17 -0400 (EDT)
- Organization: University of Bergen
- References: <gag2rl$3fq$1@smc.vnet.net>
Pasha Karami wrote:
> Dear all,
>
> An easy question:
> I would like to make an average of a data file.I know that we can use
> Mean function for this.
>
> However, I want to eliminate some values from my data.For example if I have
>
> data={1,2,3,4,5,0,0,0}
> Mean[data] would be 15/8
>
> I do not want the "zero" values in my Mean function (i.e.I want the mean
> value to be 3 in the above example) How can I do this?
>
Just filter the data first:
Cases[data, Except[0]] (* will only filter 0, but not 0.0 *)
Select[data, # != 0 &]
data /. 0 -> Sequence[] (* will only filter 0, but not 0.0 *)