544: Missing Values
The Missing Values option allows you to set options for identifying and replacing missing values. A flag should be set to identify missing values in the input datasets. In CPT version 10 files, the missing value flag is typically defined, and so this value should not normally be modified. For multiple fields it is possible to have missing value flags specific to each field, but these have to be set in the file. using the cpt:missing tag. A maximum percentage of missing values in each series and year should also be defined. If the number of missing values is less than the defined maximum, these values will be replaced using the method defined.
Replacing Missing Values gives further details about missing value estimation.