Missing Data: Replace Codes with NA using NA_If

Описание к видео Missing Data: Replace Codes with NA using NA_If

This video illustrates how to replace codes for missing values (e.g., -99) with NA values to communicate to R that the value should be treated as missing data.
It illustrates a single command to replace a universal value, a strategy to transform a single variable, and a command to deal with multiple variables at once.

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