You need to assign your data set to something -- right now you're just
reading it in and then throwing it away:
dats <- read.csv("mydata1.csv")
mean(dats$X) # Dollar sign, not ampersand
Best,
Michael
On Tue, May 15, 2012 at 8:57 AM, jacaranda tree <myjacara...@yahoo.com> wrote:
> Hi I am really new using R, so this is really a beginner stuff! I
> created a very small data set on excel and then converted it to .csv
> file. I am able to open the data on R using the command "read.table
> ("mydata1.csv", sep=",", header=T)" and it just works fine. But when I
> want to work on the data (e.g. calculate the mean of variable "X") R
> says "object not found". I tried the "attach" command or "mean
> ("mydata1.csv"&X)" but still I get the same error message. I don't
> understand why R is having difficulty finding a variable. I believe I am
> doing something wrong. I will really appreciate if you could help me
> with this.
> [[alternative HTML version deleted]]
>
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