10.25 Pivot Pairwise Binary Table
20210224 The use case is to turn a table with three columns, consisting of two columns of binary values and the third some measure, into a confusion type matrix.
tibble(a=c(0, 0, 1, 1),
b=c(0, 1, 0, 1),
c=c(8346, 275, 2736, 945)) %T>%
print() %>%
tidyr::pivot_wider(names_from=b, values_from=c)## # A tibble: 4 × 3
## a b c
## <dbl> <dbl> <dbl>
## 1 0 0 8346
## 2 0 1 275
## 3 1 0 2736
## 4 1 1 945## # A tibble: 2 × 3
## a `0` `1`
## <dbl> <dbl> <dbl>
## 1 0 8346 275
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