[R] Adding a numeric to all values in the dataframe

[David Winsemius]

On May 20, 2011, at 9:50 PM, John Kane wrote:

> I didn't quite understand your first post. Was it intended to assure  
> that the operation was only on numeric variables?

Prezactly.


>  Otherwise I don't see the differnce in applying the operation to a  
> totally numeric data.frame and a matrix.
>
>
>
> -- On Fri, 5/20/11, Bill.Venables at csiro.au <Bill.Venables at csiro.au>  
> wrote:
>
>> From: Bill.Venables at csiro.au <Bill.Venables at csiro.au>
>> Subject: Re: [R] Adding a numeric to all values in the dataframe
>> To: Bill.Venables at csiro.au, ramya.victory at gmail.com, r-help at r-project.org
>> Received: Friday, May 20, 2011, 9:37 PM
>> Oops
>>
>> The first line of my template should use data.matrix()
>> rather than data.frame()
>>
>> data.matrix() is guaranteed to return a numerical matrix
>> from a data frame, making arithmetic always possible.
>>
>> Bill Venables.
>>
>> ________________________________________
>> From: Venables, Bill (CMIS, Dutton Park)
>> Sent: 20 May 2011 14:30
>> To: 'Ramya'; 'r-help at r-project.org'
>> Subject: RE: [R] Adding a numeric to all values in the
>> dataframe
>>
>> For that kind of operation (unusual as it is) work with
>> numeric matrices.  When you are finished, if you still
>> want a data frame, make it then, not before.
>>
>> If your data starts off as data frame to begin with, turn
>> it into a matrix first.  E.g.
>>
>> myMatrix <- data.frame(myData)
>> myMatrix2 <- myMatrix + 2
>> myData2 <- data.frame(myMatrix2)
>>
>> Bill Venables.
>>
>> -----Original Message-----
>> From: r-help-bounces at r-project.org
>> [mailto:r-help-bounces at r-project.org]
>> On Behalf Of Ramya
>> Sent: Friday, 20 May 2011 1:54 PM
>> To: r-help at r-project.org
>> Subject: [R] Adding a numeric to all values in the
>> dataframe
>>
>> Hi there
>>
>> I just want to add 2 to all the values in dataframe.
>>
>> I tried using sapply but it seem to die all the time.
>>
>> Any help would be appreciated.
>>
>> Thanks
>> Ramya
>>
>> --
>> View this message in context: http://r.789695.n4.nabble.com/Adding-a-numeric-to-all-values-in-the-dataframe-tp3537594p3537594.html
>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
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>>
>> ______________________________________________
>> R-help at r-project.org
>> mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained,
>> reproducible code.
>>
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

David Winsemius, MD
West Hartford, CT