まとめ一覧
練習課題
dft <- tibble(
target1 = c("abc500ml 3unit" ,"def250ml 4unit","ghi100ml 5unit" ),
target2 = c("AST 50IU" ,"HbA1c 5.0%" ,"BMI 23.1kg/m^2" ),
target3 = c("ope:A 4.5hr 80ml","ope:B 3hr 10ml","ope:C 12.5hr 100ml")
)
- 1 target1の"xxx100ml 2unit"の、unit前の数字をぬきだしてください。
answer <- dft %>%
mutate(a = str_extract(target1,"\\d+(?=unit)"))
answer
- 2 target1の"xxx100ml 2unit"の、ml前の数字をぬきだしてください。
answer <- dft %>%
mutate(a = str_extract(target1,"\\d+(?=ml)"))
answer
- 3 target1の"xxx100ml 2unit"の、xxx部分を抜き出して下さい。
answer <- dft %>%
mutate(a = str_extract(target1,"[a-z]+(?=\\d+)"))
answer
- 4 target2の検査結果のみを抜き出してください。
answer <- dft %>%
mutate(
a = str_extract(
target2,
"(?<=\\s)((\\d+\\.\\d+)|(\\d+))"
)
)
answer
- 5 target2の単位を抜き出して下さい
- (str_replace(<ベクトル>,<正規表現>,<おきかえ>)を使うとマッチしたものをおきかえられます。)
answer <- dft %>%
select(target2) %>%
mutate(
a = str_extract(
target2,
"(?<=\\s).+$"
)
) %>%
mutate(
a2 = str_replace(
a,
"^(\\d+\\.\\d+)|^(\\d+)",
""
)
)
answer
asnwer <- dft %>%
mutate(a = str_extract(target3,"(?<=:)\\w+"))
answer <- dft %>%
mutate(a = str_extract(target3, "\\d+(?=ml)"))
まとめ一覧