[R] Calculating the mean in one column with empty cells
John Kane
jrkrideau at inbox.com
Sat Oct 6 17:38:09 CEST 2012
Where is the csv data coming from? If it is an export from a spreadsheet, Excel (and others?) has a nasty habit of exporting "as displayed" rather than the actual number as it's default.
John Kane
Kingston ON Canada
> -----Original Message-----
> From: f.sehardt at gmail.com
> Sent: Sat, 6 Oct 2012 01:11:11 -0700 (PDT)
> To: r-help at r-project.org
> Subject: Re: [R] Calculating the mean in one column with empty cells
>
> Hi,
>
> the first command was bringing the numbers into R directly:
> *> testdata <- c(0.2006160108532920, 0.1321167173880490,
> 0.0563941428921262,
> 0.0264198664609803, 0.0200581303857603, -0.2971754213679500,
> -0.2353086361784190, 0.0667195538296534, 0.1755852636926560)
>> mean(testdata)
> [1] 0.0161584*
>
> Here I tried to calculate the mean with the same numbers as given above,
> but
> taken from my dataset.
> *
>> str(dataSet2$ac_bhar_60d_4d_after_ann[1:9])
> num [1:9] 0.2 0.13 0.06 0.03 0.02 -0.3 -0.24 0.07 0.18
>> mean(dataSet2$ac_bhar_60d_4d_after_ann[1:9])
> [1] 0.01666667
> *
>
> It seems that in the second case he calculates the mean with rounded
> numbers
> (0.2 and not 0.20061601085...)
> Could it be that R imports only the rounded numbers?
> How can I build a CSV-file with numbers showing all decimal places?
> Because
> I think my current CSV-file only has numbers with 2 decimal places.
>
>
> Kind Regards,
> Felix
>
>
>
>
> --
> View this message in context:
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> Sent from the R help mailing list archive at Nabble.com.
>
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