使用R，当同一行的Column2包含一个单词时，如何获取“ column1”中的“ cell”以进行更新？

Question

Using R, is there a regex way that I get a 'cell' in 'Column1' to update when 'Column2' on the same row contains a word within its contents?

For example# If I wanted cells that contain 'time' anywhere in them to then update the matrix' Column1 to '10' as below

Column1        Column2 
 10            that is the time 
 10            what time is the match
 0                 where is the car?

Currently I can get it to work for non regex (only if the exact cell contents is 'time' using the below;

ds1$test[ds1$Column2 %in% "time"] <- 10

Thanks in advance.

Answer 1

我们可以使用grep

df1$Column1[grep("time", df1$Column2)] <- 10