hi
liste=1:100 tout <- data.frame(aa=liste,bb=sqrt(liste)) tout[abs(tout[,2]-4.5)<0.5,]``` works very fine but why does :
liste=1:100 tout <- data.frame(aa=liste,bb=sqrt(liste)) tout[tout[,2]>4 && tout[,2]<5<0.5,]
does not ?
you can do
1<2
and you can do
2<3
but you cant do
1<2<3
try it ...
but you can do either of
(1<2)&(2<3) (1<2)&&(2<3)
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