# listwise (dataloop)¶

## Purpose¶

Controls listwise deletion of missing values.

## Format¶

listwise [[read]] [[write]];


## Remarks¶

If read is specified, the deletion of all rows containing missing values happens immediately after reading the input file and before any transformations. If write is specified, the deletion of missing values happens after any transformations and just before writing to the output file. If no listwise statement is present, rows with missing values are not deleted.