MagnitudeDifferenceToBeZero
Posted: Fri Nov 13, 2015 6:24 am
Hi,
Has anyone successfully implemented this in TM1 before? It seems not working in TM1 10.2 FP4 now. I have set this parameter in the config file and reboot the server. Using a rule like C = A \ B where B is tiny number such as .0000000000000004, I still got huge C? Is it supposed to be Zero according to the document?
Has anyone successfully implemented this in TM1 before? It seems not working in TM1 10.2 FP4 now. I have set this parameter in the config file and reboot the server. Using a rule like C = A \ B where B is tiny number such as .0000000000000004, I still got huge C? Is it supposed to be Zero according to the document?
MagnitudeDifferenceToBeZero
Sets the order of magnitude of the numerator relative to the denominator, above which the denominator equals zero when using a safe division operator.
Parameter type: optional, static
In rules and TurboIntegrator, there is a safe division operator (the backslash). With this, if you try to divide by zero, the result is zero, not undefined. If the denominator to the division is a calculated quantity, the result can be very close to zero, but not exactly zero, for example, .0000000000000004. By setting the MagnitudeDifferenceToBeZero parameter, you can specify how close a number can be to zero, relative to the magnitude of the numerator, to be considered as zero for the safe division operator.
Consider this example:
In the file Tm1s.cfg, set MagnitudeDifferenceToBeZero=14
The operation is A \ B
Note: Backslash (\) is the safe division operator in TurboIntegrator.
A = 1000 B = 1.5e-15
B is 18 orders of magnitude less than A
18 > 14, therefore the save division operator returns B=0