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29250
2005 Jul 14
2
Calculate of data frame
Hello,
I have a dataframe which I read from a file:
df <- readtable(myFile);
The dataframe has 4 columns: "model", "count", "value" and "date" where
"model" and "date" are made of charactors and "count" and "value" are
numbers. An example is like:
model count value date
A 4 20.8