I'm trying to convert data from character to numeric.

 I've imported data as a csv file, I'm assuming that the import is a
database - are all the columns in  a database considered "vectors"  and that
they can be  operated on individually
Therefore I've tried the following
mydata <- as.numeric(mydata$apples)

when i then look at mydata again  the named column is still in "character"
format
 if i do mydata2 <- as.numeric(mydata$apples)
the new object mydata2 is empty.

Am i missing something about the structure of R?

alina

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