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2007 Nov 25
2
rowMean, specify subset of columns within Dataframe?
...t growth over 5
years (I1 through I5) where each tree is a row and each row has 5 columns.
So far I have achieved this using rowMeans when all columns are numeric type
and used in the calculation:
Data1 <- data.frame(cbind(I1 = 3, I2 = c(0,3:1, 2:5,NA), I3
=c(1:4,NA,5:2),I4=2,I5=3))
Data1
Data1$mean_5 <- rowMeans(Data1, na.rm =T)
Data1
My real dataset has many columns including several Factor type. Is it
possible to specify a range of columns within a data frame using rowMeans
dims= (say where there is a one
Factor column called Species leading I1 to I5, and one Factor column called
Moist...