R help - Jan 2014 - Object not Found Error on a .csv file

Hello:

I am a new user, running the latest version of R on my Mac.  I have started by
reading a file with the read.csv command:
task2analyses <-
read.csv(file="GroupsWithRTsEqualN.csv",head=TRUE,sep=",")

When I print it out in R, the file appears to be intact, with the proper
headers.  Yet, when I run test commands like the
following:
> cor(GfullUA,GFullUA) 
I get back a message Error in is.data.frame(y) : object 'GFullUA' not
found

This is not the case for all of the variables in the file.  Some can be tested
with is.numeric (or character). And some are read
properly when I test the summary command.  

I have looked on Google, and have been unsuccessful in searching documentation.

Thanks for any help,

Valerie Shalin

Hi Valerie,

Assuming GfullUA is a column of your data frame task2analyses, you
need to tell R where to look. It's trying to find an object called
GfullUA, and there isn't one.

Here are two ways:
with(task2analyses, cor(GfullUA, GFullUA))

cor(task2analyses$GfullUA, task2analyses$GFullUA)

You might want to read the Introduction to R that came with your
software installation.

Sarah

On Thu, Jan 16, 2014 at 1:32 PM, Valerie Shalin <valerie at knoesis.org>
wrote:
> Hello:
>
> I am a new user, running the latest version of R on my Mac.  I have started
by reading a file with the read.csv command:
> task2analyses <-
read.csv(file="GroupsWithRTsEqualN.csv",head=TRUE,sep=",")
>
> When I print it out in R, the file appears to be intact, with the proper
headers.  Yet, when I run test commands like the following:
>> cor(GfullUA,GFullUA)
>
> I get back a message Error in is.data.frame(y) : object 'GFullUA'
not found
>
> This is not the case for all of the variables in the file.  Some can be
tested with is.numeric (or character). And some are read
> properly when I test the summary command.
>
> I have looked on Google, and have been unsuccessful in searching
documentation.
>
> Thanks for any help,
>
> Valerie Shalin
-- 
Sarah Goslee
http://www.functionaldiversity.org