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並前往https://www.generacodice.com/en/articolo/1722662/recode-/-rename-data-within-a-dataframe-while-grep-is-used-to-selected-certain-variables

Recode / rename data within a dataframe while grep is used ...

In my dataframe I select only variables test3-test8 Now I want to replace with . ... Error in [<-.data.frame ( *tmp* , , grep("(^dv_beh_[0-9]+r)", ...

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