# xan fill ```txt Fill empty cells of a CSV file by filling them with any non-empty value seen before (this is usually called forward filling), or with any constant value given to the -v, --value flag. For instance, replacing empty values with 0 everywhere in the file: $ xan fill -v 0 data.csv > filled.csv Usage: xan fill [options] [] xan fill --help fill options: -s, --select Selection of columns to fill. -v, --value Fill empty cells using provided value instead of using last non-empty value. Common options: -h, --help Display this message -o, --output Write output to instead of stdout. -n, --no-headers When set, the file will be considered as having no headers. -d, --delimiter The field delimiter for reading CSV data. Must be a single character. ```