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Expanding aggregates in #R #df #wrangling
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| df <- data.frame(x = c(2, 4, 1), y = c(9, 11, 6), n = c(3, 5, 1)) | |
| rep(1:nrow(df), df$n) | |
| df[rep(1:nrow(df), df$n), ] |
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