Are you creating your own (de-)vectorization problems?

[jennybc]

Sometimes we are the ones who miss opportunities to vectorize our own functions. Or sometimes we de-vectorize things that started out as vectorized. Red flags:

@colearendt:

Thinking too much in control structures like if () {} else {} often lands me in a non-vectorized state.

@hadley:

use of unlist() is a good warning sign that you're de-vectorising a function

[hadley]

Two examples at https://dcl-2018-01.github.io/curriculum/vector-functions.html

[jennybc]

Great word @hadley said in meeting today: "scalarize". Meaning the opposite of vectorize.