Re: eliminate values while caculating Mean[data]
- To: mathgroup at smc.vnet.net
- Subject: [mg91970] Re: eliminate values while caculating Mean[data]
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Mon, 15 Sep 2008 03:42:25 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <gag2rl$3fq$1@smc.vnet.net>
Pasha Karami wrote:
> 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?
You could filter the data with *DeleteCases*, for instance.
In[1]:= data = {1, 2, 3, 4, 5, 0, 0, 0}
sample = DeleteCases[data, 0]
Mean[sample]
Out[1]= {1, 2, 3, 4, 5, 0, 0, 0}
Out[2]= {1, 2, 3, 4, 5}
Out[3]= 3
Regards,
-- Jean-Marc