[R] converting factor to numeric gives "NAs introduced by coercion"
angelica.ekenstam at dpes.gu.se
Fri Jul 29 10:45:22 CEST 2011
I have a dataframe that I imported from a .txt file by:
skogTemp <- read.delim2("Skogaryd_shoot_data.txt", header=TRUE, fill=TRUE)
and the data are factors, how can avoid factors from the beginning? Although
the file contains both characters and numbers.
I tried to convert some of the columns from factor to numeric and as I
understood it you can not use only as.numeric but as.character first. I got
this warning message:
> skogTemp_1 <- as.numeric(as.character(skogTemp_1[,2:4]))
NAs introduced by coercion
I have lots of NAs in my data. Tries to check what class I had now but
another warning is given me:
Error in skogTemp_1[, 2] : incorrect number of dimensions
Error in skogTemp_1[1, 2] : incorrect number of dimensions
frustrating... I don't know what this mean.
Can anyone help?
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