[R] Dataframe manipulation

From: Antje <niederlein-rstat_at_yahoo.de>
Date: Tue, 04 Dec 2007 11:46:31 +0100


can anybody help me with this problem?
I have a dataframe, which contains its values as factors though I have numbers but it was read as factors with "scan". Now I would like to convert these columns (multiple) to a numeric format.

# this example creates a similar situation

testdata <- as.factor(c("1.1",NA,"2.3","5.5")) testdata2 <- as.factor(c("1.7","4.3","8.5",10.0))

df <- data.frame(testdata, testdata2)

what do I have to do to get the same datafram but with numeric values???


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