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Asked: 2026-06-03T21:32:29+00:00

How to combine all state names in a single vector, instead of listing all

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How to combine all state names in a single vector, instead of listing all the logical exclusions separately? I found function %notin% on the CRAN website, but R doesn’t recognize is as a legitimate function.

indata <- indata[which(indata$STATE != "GU" & indata$STATE != "WY" &
                       indata$STATE != "KS" & indata$STATE != "ME" &
                       indata$STATE != "MT" & indata$STATE != "ND" &), ]

Thanks.

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1 Answer

  1. Editorial Team
    indata[!indata$STATE %in% c("GU", "WY", "KS", "ME", "MT", "ND"), ]

    EDIT: @CarlWitthoft, believe it or not, I’ve actually had the following in a private package for a while

    `%notin%` <- function (x, table) x[!x %in% table]

    However, I never think to use it until after I’ve already typed it out the long way. Plus, using it makes my code less distributable. I was not aware of 

    operators:::`%!in%`

    which is only the second half of %notin%

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