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swirldev / swirl_courses

:mortar_board: A collection of interactive courses for the swirl R package.
http://swirlstats.com
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Update lesson.yaml #501

Open YHx07 opened 2 years ago

YHx07 commented 2 years ago

Sollution https://github.com/swirldev/swirl_courses/issues/498

This problem with "!" in the beginning of line: Hint: !is.na(c(3, 5, NA, 10)) will negate the previous command, thus telling us what is NOT NA.