String Extraction Expression (PageIN only)

For PageIN data, there is a special expression to extract information from an input ASCII file:

column row length 

For example, to extract the string in column 37 to 43 on row 14 the expression would be:

37 14 7;

This string extraction expression is often used as the right-hand side in assignment statements, for example:

$strg = 37 14 7;