Re: [R] lm on group

You can guess by looking at class(g). It is a factor. It is NOT regressing on the mean of g (i.e. 2.5 and 7.5) and you could have changed g from (0,5] and (5,10] to A and B with the same results. Read some books or help(lm) to get an idea of what the outputs mean. Regards, Adai newbieR

[R] lm on group

Hi all, I have a quick question about lm on group, say I have: x <- 1:10 y <- x*3 buckets <- seq(0, 10, by=5) g <- cut(x, buckets) summary(lm(y ~ g - 1)) Coefficients: Estimate Std. Error t value Pr(>|t|) g(0,5] 9.000 2.121 4.243 0.00283 ** g(5,1