My keep function in advanced training does not work and only returns a ZERO. Below is the code an the image.
$Grade106 = $gcwp.keep('Grade Code',
isEqualTo('Grade 106'))
$Grade107 = $gcwp.keep("Grade Code",
isEqualTo("Grade 107"))
$Grade108 = $gcwp.keep("Grade Code",
isEqualTo("Grade 108"))
0.splice(0.6,$Grade106).splice(1.15,$Grade107).splice(1.75,$Grade108)