How to Override Bad Values in R Dataframes with NA From a Lookup Table

Replace Blank by NA in R (Example) | Exchange Empty Data Frame Cell & Space | Insert Missing ValuesПодробнее

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Replace NA with 0 or Omit NA in RПодробнее

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Replace Character Value by NA in R (Example) | Vector & Data Frame | Substitute & Exchange MissingsПодробнее

Remove or Show NA Values in Table in R (Examples) | table() Function & useNA Argument | Missing DataПодробнее

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Replace NA Values by Row Mean in R (Example) | Exchange & Substitute Missings | rowMeans() & is.na()Подробнее

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Replace NA Values in Column by Other Variable in R (Example) | Substitute NAs in Data Frame | is.naПодробнее

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