Mantissa Check - mkraska/meclib GitHub Wiki
Procedure based on this forum discussion.
This check is implemented in the feedback function fb_unit.
Question variables
ra(x,y):=stack_units_nums(stack_unit_si_to_si_base(x))/stack_units_nums(stack_unit_si_to_si_base(y));
mantissaOK(x,y,tol):= is( abs(round( log(ra(x,y))/log(10))-log(ra(x,y))/log(10))<tol);
PRT
This example is in the context of a unitless question design but input with units.
Field | Value |
---|---|
Answer test | AlgEquiv |
SAns | mantissaOK(S_A/m^2,A,0.005) Answer S_A with units is made unitless, compared to unitless reference A |
TAns | true |
true feedback | Die Mantisse stimmt, die Zehnerpotenz weicht aber um mindestens eine Größenordnung ab. Prüfen Sie Ihre Einheitenumrechnung. |