Function: gradient[1](divide(log(mean(numbers('rrr') if numbers('ryy') > numbers('yyx') else numbers("xyx"), numbers('rrr')), numbers("xyx") if numbers('yyx') > numbers('ryy') else numbers('rrr')), mean(numbers('rrr') if numbers("xyx") > numbers('ryy') else numbers('yyx'), numbers('rrr'))))
