Closed nathaneastwood closed 4 years ago
For example
r$> data <- data.frame(a = c(0, 1, 0, 1, 0, 1), b = rnorm(6)) r$> data a b 1 0 0.1975196 2 1 -0.9084617 3 0 -1.1766728 4 1 -2.3127030 5 0 -0.7029450 6 1 -2.2935241 r$> data %>% group_by(a) %>% mutate(b2 = b * 2) a b b2 1 0 0.1975196 0.3950392 3 0 -1.1766728 -2.3533457 5 0 -0.7029450 -1.4058900 2 1 -0.9084617 -1.8169233 4 1 -2.3127030 -4.6254060 6 1 -2.2935241 -4.5870483 Groups: a
For example