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.venab...@csiro.au <bill.venab...@csiro.au>
wrote:
From: bill.venab...@csiro.au <bill.venab...@csiro.au>
Subject: Re: [R] Adding a numeric to all values in the dataframe
To: bill.venab...@csiro.au, ramya.vict...@gmail.com, r-help@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@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-boun...@r-project.org
[mailto:r-help-boun...@r-project.org]
On Behalf Of Ramya
Sent: Friday, 20 May 2011 1:54 PM
To: r-help@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
--
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______________________________________________
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David Winsemius, MD
West Hartford, CT
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