如何从字符串中查找特定单词并按这些单词合并变量[关闭]

假设我有一个数据“A”，例如：

Disease_name
(J189)Pneumonia, unspecified
(R51)Headache
(M4806)Spinal stenosis, lumbar region
(M512)Other specified intervertebral disc displacement
(C187)Sigmoid colon
(N201)Calculus of ureter
(C189)Colon, unspecified
(S0600)Concussion, without open intracranial wound
(C73)Malignant neoplasm of thyroid gland
(C509)Breast, unspecified
(K746)Other and unspecified cirrhosis of liver
(B181)Chronic viral hepatitis B without delta- agent
(R42)Dizziness and giddiness

另一个数据集 B 如下：

parts         key
Chest       pneumonia
Head        headache
Abdominal   spinal
Abdominal   intervetebral
Abdominal   colon
Abdominal   ureter
Abdominal   colon
Head        concussion
Neck        thyroid
Chest       breast
Abdominal   liver
Abdominal   hepatitis
Head        giddiness

我想找到的话B$key from A&disease_name并通过那些匹配的关键字将 A 合并到 B 以分配B$parts to A&disease_name.

我怎样才能在 R 中做到这一点？

欢迎来到SO！这个问题对我来说已经足够清楚了。这是一个tidyverse解决方案。

首先读取一些数据：

library(dplyr)

tmp <- data.table::fread(
"Disease_name
(J189)Pneumonia, unspecified
(R51)Headache
(M4806)Spinal stenosis, lumbar region
(M512)Other specified intervertebral disc displacement
(C187)Sigmoid colon
(N201)Calculus of ureter
(C189)Colon, unspecified
(S0600)Concussion, without open intracranial wound
(C73)Malignant neoplasm of thyroid gland
(C509)Breast, unspecified
(K746)Other and unspecified cirrhosis of liver
(B181)Chronic viral hepatitis B without delta- agent
(R42)Dizziness and giddiness",
sep = ""
)


tmp2 <- data.table::fread(
  "parts  key
Chest   pneumonia
Head    headache
Abdominal   spinal
Abdominal   intervertebral
Abdominal   colon
Abdominal   ureter
Abdominal   colon
Head    concussion
Neck    thyroid
Chest   breast
Abdominal   liver
Abdominal   hepatitis
Head    giddiness"
)

然后我们进行连接：

result <-
  tmp %>%
  mutate(key = gsub(paste0(".*(", paste(tmp2$key, collapse = "|"), ").*"),
  "\\1",
  tolower(tmp$Disease_name))) %>%
  left_join(tmp2)
#> Joining, by = "key"

导致：

result
#>                                              Disease_name            key
#> 1                            (J189)Pneumonia, unspecified      pneumonia
#> 2                                           (R51)Headache       headache
#> 3                   (M4806)Spinal stenosis, lumbar region         spinal
#> 4  (M512)Other specified intervertebral disc displacement intervertebral
#> 5                                     (C187)Sigmoid colon          colon
#> 6                                     (C187)Sigmoid colon          colon
#> 7                                (N201)Calculus of ureter         ureter
#> 8                                (C189)Colon, unspecified          colon
#> 9                                (C189)Colon, unspecified          colon
#> 10     (S0600)Concussion, without open intracranial wound     concussion
#> 11               (C73)Malignant neoplasm of thyroid gland        thyroid
#> 12                              (C509)Breast, unspecified         breast
#> 13         (K746)Other and unspecified cirrhosis of liver          liver
#> 14   (B181)Chronic viral hepatitis B without delta- agent      hepatitis
#> 15                           (R42)Dizziness and giddiness      giddiness
#>        parts
#> 1      Chest
#> 2       Head
#> 3  Abdominal
#> 4  Abdominal
#> 5  Abdominal
#> 6  Abdominal
#> 7  Abdominal
#> 8  Abdominal
#> 9  Abdominal
#> 10      Head
#> 11      Neck
#> 12     Chest
#> 13 Abdominal
#> 14 Abdominal
#> 15      Head

^{Created on 2018-09-28 by the reprex package https://reprex.tidyverse.org (v0.2.1)}