hello,
The error message is right, you have read the file have NOT assigned it to
an object, to a variable.
mydata1 <- read.table ("mydata1.csv", sep=",", header=T)
Now you can use the variable 'mydata1'. It's a data.frame, and you can see
what it looks like with the following instructions.
str(mydata1) # str for structure
head(mydata1) # default is first 6 lines
Note also that you could have called your dataset a name different from the
filename.
> mean ("mydata1.csv"&X)
Where have you found that syntax???
Correct
mean(mydata1$X)
mean(mydata1[ , "X" ])
You should read R-intro.pdf, it comes with any installation of R, folder
doc.
There are obvious "beginner stuff" things you could quickly learn.
Hope this helps,
Rui Barradas
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