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tpemartin / 110-1-r4ds-main

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Exercise 4.16 In johnDoe data set, Add a column called 發現日期 #55

Open tpemartin opened 2 years ago

tpemartin commented 2 years ago

Exercise 4.16 In johnDoe data set,

  1. Add a column called 發現日期 to johnDoe$data which is a date class vector.

  2. How many dead bodies have no discovered dates?

  3. Which month has the highest report number?

raychiu135 commented 2 years ago

https://github.com/raychiu135/110-1-r4ds-main/blob/7764b84117a53c6a8b456a78eb9477a99909df9b/exercise_4.16.rmd#L2

AmyChen20021003 commented 2 years ago

https://github.com/AmyChen20021003/110-1-r4ds-main/blob/9e4cb1074b80e72806eaaa3a6eb7ef82113c549e/4-16.Rmd#L10

linttttt commented 2 years ago

https://github.com/linttttt/110-1-r4ds-main/blob/6a5effdd83d10c04d234fb6189617c9db086eb87/studyCH4(EX).Rmd#L292