Created
June 27, 2018 08:29
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dplyr conteggio e proporzione in riga per grouppi
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| rm(list = ls()) | |
| library(dplyr) | |
| df <- data_frame(y = rnorm(10,2), | |
| x1 = as.factor(rbinom(10,1,0.5)), | |
| x2 = as.factor(rep(letters[1:2],5))) | |
| df | |
| df %>% | |
| add_count() %>% | |
| add_count(x1) %>% | |
| mutate(prop = nn/n) |
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