package require oleo
load-oleo mysheet.oleo
set ws [toMat]
set subset [subRows $ws [mand [mstreq 2 foo] [mstreq 3 bar]]
It has what I think is a nice little query language, too. In the last line I select the rows from the spreadsheet sheet column 2 is equal to foo and column 3 is equal to bar.
It's so lightweight!