search for: o2con

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2010 Jul 18
2
simple loop(?) analysing subsets
...I run a simple loop that produces a regression for each species as identified in the variable species id, which is one column in the large data set that I am using? Simple regression that I wish to repeat data<- read.table("?/STUDY.txt",header=T) names(data) model<- with(data,{lm(o2con~bm)}) summary(model) sample data set species id o2con bm 1 0.5 5 1 0.6 2 1 0.4 4 1 0.4 2 1 0.5 3 2 0.3 7 2 0.4 8 2 0.5 3 2 0.7 4 2 0.9 2 3 0.3 6 3 0.7 2 3 0.4 1 3 0.3 7 5 0.3 2 5 0.6 1 5 0.9 7 5 0.2 5...