数据框中的字符串替换，同时保持R中的其他列不受影响

df$特定列 <- gsub("需要替换的字符串", "替换后的字符串", df$特定列)

# 创建一个示例数据框
df <- data.frame(
  id = c(1, 2, 3, 4),
  name = c("John", "Mary", "Tom", "Alice"),
  city = c("New York", "Los Angeles", "Chicago", "Houston")
)

# 输出替换前的数据框
print(df)

# 将name列中的字符串"John"替换为"David"
df$name <- gsub("John", "David", df$name)

# 输出替换后的数据框
print(df)

  id  name         city
1  1  John     New York
2  2  Mary  Los Angeles
3  3   Tom      Chicago
4  4 Alice      Houston

  id  name         city
1  1 David     New York
2  2  Mary  Los Angeles
3  3   Tom      Chicago
4  4 Alice      Houston