Auxiliary * Lookup

lidygal · Post by **lidygal** » Thu May 26, 2005 9:04 pm

How can I multiply an Auxxiliary with a lookup?

I did iin this way:

Lookup(auxiliary)

But in the result only multiply the first value of the lookup by the auxiliary.

LAUJJL · Post by **LAUJJL** » Fri May 27, 2005 7:58 am

Hi Lidygal

First you should correct the units error.
I never run a model that has any unit error in it, unless warnings.

Secondly the model when run gives the following error:

WARNING: At 2003 Above -Impuestos- computing -Impuestos por pagar-.

Meaning that the lookup gets value as input higher than what was expected.

The lookup expects value from 1 to 5 and gets input that are higher then 42 the
Utilidad de operaciôn.

The problem comes probably from this incoherence.
Regards.
J.J. Laublé

bob@vensim.com · Post by **bob@vensim.com** » Fri May 27, 2005 10:45 am

Just to clarify - a Lookup is a function specified by pairs of numbers that convert an input to an output. Thus the normal format is

lookup output = lookup function(lookup input)

If you also want to multiply the output you can use

result = lookup function(lookup input) * auxiliary multiplier