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Create a list of summary variables by group
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| a <- rep(c(1, 2), each = 4) | |
| b <- c(1,2,3,4,5,6,7,8) | |
| frame <- data.frame(a,b) | |
| library(dplyr) | |
| library(tidyr) | |
| x <- frame %>% | |
| group_by(a) %>% | |
| summarise(Mean = mean(b), | |
| SD = sd(b)) %>% | |
| gather(stat, val, Mean, SD) %>% | |
| unite(stat, stat, a, sep = "_") %>% | |
| spread(stat, val) %>% | |
| as.list() | |
| list2env(x, envir = environment()) |
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