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I need help with a calculation in VFE. I'm looking for instructions on a simple calculation for the following scenerio - observaction terms in parenthases below:
(AB INDEX L#1) divided by (LTBRACHBPDIA) equals (ABI L RESTNG)
a / b = x
I'd prefer that the result (x) automatically populates IF a and b are entered during this encounter (OBNOW).
Thanks, Sharon
Posted : March 28, 2016 6:06 am
All obs terms are stored as strings. Must convert string to value for computation and value results to strings to store in obs terms, e.g.
obsnow("X",ABI_Calc(obsnow("A"),obsnow("B"))
.
.
.
{fn ABI_Calc(strA,strB)
{
local strResult=""
strResult=str(val(strA)/val(strB)
}
}
Posted : March 28, 2016 6:24 am
Sharon,
Dr. Fitzgerald is correct. You must convert the string values to numeric before you can perform the calculation. If you are wanting the calculation to update each time you enter a value for the OBS terms AB INDEX L#1 and LTBRACHBPDIA; you might want to include a watcher expression in the function view that calls the calculation function as follows:
//Update calculation when numerator and denominator OBS terms get updated
{
!if ((OBSNOW("AB INDEX L#1") <> UNDEFINED) and (OBSNOW("LTBRACHBPDIA") <> UNDEFINED)) then
//Execute function to update ABI calculation
ABI_Calc(OBSNOW("AB INDEX L#1"),OBSNOW("LTBRACHBPDIA"))
else
//Do nothing
endif
}
//Function definition (include in function view)
{fn ABI_Calc(strA,strB)
{
local strResult=""
strResult=str(val(strA)/val(strB))
//update calculation OBS term
OBSNOW("ABI L RESTNG",strResult)
}
}
Posted : March 28, 2016 6:49 am
