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arguemnt
2011 Aug 18
3
Is this a bug for my fault?
Dear sir/madam,
I tried to recode some complex multiple variables and run into a problem that
r can change only some column that I want to change.
I can reproduce the problem with this
idfortest <- c(6,23,46,63,200,238,297,321,336,364,386,392,414,434,441)
id <- seq(1:500)
id[id==idfortest]
the result showed
Warning in id == idfortest :
longer object length is not a multiple of shorter
2010 Oct 04
3
How To Extract Row from A Data Frame
I have a data frame that looks like this:
> print(df)
V2 V3 V4 V5 V6 V7 V8 V9 V10 V11 V12
1 FN 8.637 28.890 31.430 31.052 29.878 33.215 32.728 32.187 29.305 31.462
2 FP 19.936 30.284 33.001 35.100 30.238 34.452 35.849 34.185 31.242 35.635
3 TN 0.000 17.190 16.460 21.100 17.960 15.120 17.200 17.190 15.270 15.310
4 TP 22.831 31.246 33.600 35.439 32.073