Fill Missing Values

This function allows to fill with some value those rows in which there was no data to begin with.

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Parameters

• Column to fill values in
• Method to use
  • Constant value: use a constant value throughout the whole column
  • Least frequent value: fill with the least frequent value of the column
  • Most frequent value: fill with the most frequent value of the column
  • First value in alphabetical order: fill with the first value of the column in alphabetical order
  • Last value in alphabetical order: fill with the last value of the column in alphabetical order
  • Next valid observation: fill with the same value that the next non-null row has
  • Previous valid observation: fill with the same value that the previous non-null row has