R help - May 2010 - Problems executing cor(dataset) function in R 2.11.0 for OS X ( It works fine in R 2.10.1)

Dear all,
when trying to replicate John M. Quick's example for correlations between
multiple variables posted on:

http://rtutorialseries.blogspot.com/2009/11/r-tutorial-series-zero-order.html

with R 2.11.0 (GUI 1.33) using my MacBook Pro with OX X 10.5.8 I got the
following error message

> datavar<-read.csv("dataset_readingTests.csv")
> cor(datavar)
Error in cor(datavar) : 'x' must be numeric

The funny thing is that when I tried to do the same example using R 2.10.1, it
worked fine.
Any ideas regarding how to solve this problem?
Many thanks in advance,
Ruben

On 10/05/2010 7:36 AM, Ruben Garcia Berasategui wrote:
>  Dear all,
> when trying to replicate John M. Quick's example for correlations
between multiple variables posted on:
>
>
http://rtutorialseries.blogspot.com/2009/11/r-tutorial-series-zero-order.html
>
> with R 2.11.0 (GUI 1.33) using my MacBook Pro with OX X 10.5.8 I got the
following error message
>
>
>   
>> datavar<-read.csv("dataset_readingTests.csv")
>> cor(datavar)
>>     
> Error in cor(datavar) : 'x' must be numeric
>
> The funny thing is that when I tried to do the same example using R 2.10.1,
it worked fine.
> Any ideas regarding how to solve this problem?
I would think the first step would be to ask Mr. Quick what's wrong.

Duncan Murdoch