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matching and merging #df in #R
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| grades <- c(1, 2, 2, 3, 1) | |
| info <- data.frame( | |
| grade = 3:1, | |
| desc = c("Excellent", "Good", "Poor"), | |
| fail = c(F, F, T) | |
| ) | |
| # info table with grades | |
| id <- match(grades, info$grade) | |
| info[id, ] |
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