Nested iteration/looping

[DSHerzberg]

You have a set of tests: A, B, C, D Each test has subscales: X, Y, Z At each level of test, you want to score all subscales, so A: X, Y, Z B: X, Y, Z . . . and so on Jenny suggested that instead of thinking of this as an iteration problem, it's best to wrangle the data so that the two columns test, subscale are unnested into a single column

[jennybc]

I'll ponder if this can be worked into the purrr session, but it would probably going zero to sixty too fast. Thinking on it.