Simple lookup to insert values in an R data frame

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没有蜡笔的小新
没有蜡笔的小新 2021-02-07 16:38

This is a seemingly simple R question, but I don\'t see an exact answer here. I have a data frame (alldata) that looks like this:

Case     zip     market
1              


        
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  •  醉梦人生
    2021-02-07 17:03

    Another option that worked for me and is very simple:

    alldata$market<-with(zipcodes, market[match(alldata$zip, zip)])
    

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