Hey guys,
Could someone help me with Calculating a difference between two Measures, BUT - The difference is coming from two variables in one column.
So, I have a column called "Category" and there are only two Variables in there called HELOC 2017 and HELOC 2018. And I want to calculate the Difference from the measure called "Target Group %" by "Category".
I have tried several methods.
First, I used Tableau's default difference calculation and made changes on the table calculations.
ZN(SUM([Target Perct 2017])) - LOOKUP(ZN(SUM([Target Perct 2018])), 0)
This works BUT- I cant view by "Category".
I also made 3 Calculated Measures, They are:
1. IF [Target] = "HELOC Category 2017" THEN [Target group %] ELSE NULL END
2. IF [Target] = "HELOC Category 2018" THEN [Target group %] ELSE NULL END
3. [Target Perct 2017]-[Target Perct 2018]
But the 3rd Calculated Measure gives me a null value.
The first Screen shot is ultimately what i want but to show that across my Target Dimension Column correctly.
Any help would be greatly appreciated.
Hi Guen,
Please be sure first and second calculations are not giving null.
Tableau wnt do arithmetic operations on Null.
Eg: Null-78= Null
## Replace Null with 0 may be gives you result.
IF [Target] = "HELOC Category 2017" THEN [Target group %] ELSE 0 END
or
By using Null functions replace the null value with 0 . i hope this will help you.
Thanks,
Khadeer
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