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narath/r_keep_only_first_row.md

Created July 29, 2019 20:42
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R: keep only the first row for duplicate data
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r_keep_only_first_row.md

How to keep only the first instance of a row

Derived from this helpful stackoverflow answer

dup_data %>% 
  group_by(MRN) %>%
  filter(Year == min(Year)) %>%
  slice(1) %>%
  ungroup()
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