[R] how to exclude certain keywords in strings

lily li chocold12 @ending from gm@il@com
Fri Oct 12 05:59:11 CEST 2018

Hi R users,

I don't know how to extract certain words in strings. For example, if I
have strings like the formats "StationName1_temp.csv",
"StationName2_temp.csv", etc. How to get strings like these "StationName1",
"StationName2", etc? That is to say, I want to exclude the keywords
"_temp.csv", but I could not find a clue online. Thanks for your help.

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