r - Filter a vector of strings based on string matching

Question

posted Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

I have the following vector:

X <- c("mama.log", "papa.log", "mimo.png", "mentor.log")

How do I retrieve another vector that only contains elements starting with "m" and ending with ".log"?

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1 Reply

深蓝 · Answer 1 · 2021-10-17T02:57:55+0000

replyed Oct 17, 2021 by 深蓝 (71.8m points)

you can use grepl with regular expression:

X[grepl("^m.*\.log", X)]

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