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2003 Dec 14
3
Problem with data conversion
...actually numerical variables but in the dataframe, they are represented as "characters". I tried to change the type of the variables (from character to numeric) using the edit function (and bringing up the data grid where then I made changes), but the changes were not saved. I tried mma1 <- as.numeric(mma) but I was not successful in converting mma from a character variable to a numeric variable. So, to edit and "clean" the data, I exported the dataset as a text file to Epi Info 2002 (version 2, Windows). I used the following code: mysubset <- subset(working...