From sapply to vapply

As highlighted before, vapply() can be considered a more robust version of sapply(), because you explicitly restrict the output of the function you want to apply. Converting your sapply() expressions in your own R scripts to vapply() expressions is therefore a good practice (and also a breeze!).

Bu egzersiz

Intermediate R

kursunun bir parçasıdır

Kursu Görüntüle

Egzersiz talimatları

Convert all the sapply() expressions on the right to their vapply() counterparts. Their results should be exactly the same; you're only adding robustness. You'll need the templates numeric(1) and logical(1).

Uygulamalı interaktif egzersiz

Bu örnek kodu tamamlayarak bu egzersizi bitirin.

# temp is already defined in the workspace

# Convert to vapply() expression
sapply(temp, max)

# Convert to vapply() expression
sapply(temp, function(x, y) { mean(x) > y }, y = 5)

Kodu Düzenle ve Çalıştır