tidyr
https://rpubs.com/bradleyboehmke/data_wrangling
- tidyr
- dplyr
- row
filter()
, distinct(),arrange()
- sample_n(), slice_sample(), sample_frac()
group_by()
,summarise()
, summarise_each()
- two table
join()
, right_join()
- etc.
- rename()
- row
- tibble
rownames_to_column
gather() vs. spread()
R
sampel data
https://statkclee.github.io/r-novice-gapminder/14-tidyr-kr.html

R
unite() vs. separate()
R
sampel data
R