> ## Documentation Index
> Fetch the complete documentation index at: https://docs.graphext.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fill Missing Values

> Use a function to fill missing values

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

<Note>
  Check out the [replace\_missing](/api-docs/prepare/transform/replace_missing)
  step for more information.
</Note>

## 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