A high level routine that creates a "selection mask" on the basis of a text match to values in the specific column of a table file. The output will be a simple ASCII file with the number of lines matching the number of data rows in the input table file. The values on each out put line is a "Y" if the value matches the text string or a "N" if the value does not match.

% table_text_mask --help    

Usage: table_text_mask A1 PSYSNAME B mask1  
arg1 - basename of table file (A for A.table)   
arg2 - parameter name to use for testing 
arg3 - text pattern to be matched  
arg4 - name of mask file to be made