Field
to mask (make Nan) values greater than a certain number:
value maskgt
to mask values less than a certain number:
value masklt
to flag (make 1 while all others are 0) values greater than a certain number:
value flaggt
to flag values greater than or equal to a certain number:
value flagge
to flag values less than a certain number:
value flaglt
to flag values less than or equal to a certain number:
value flagle
Can be used to remove or seperate data based on value before analysis.