# Qlik Sense App Development

Discussion board where members can learn more about Qlik Sense App Development and Usage.

New Contributor

## Filtering and comparing two month year

What I want to do here is this, I have 3 years worth of data and what to compare costs in any given month.

How do I get create a calculated column that will be the difference of Cost Per Kg (in the right) - Cost Per Kg (in the left)

So in the example below, I would want have a column there that would be called Cost Per Kg (difference)

Row 1 will then be 15.66-15.74

Thanks.

1 Solution

Accepted Solutions
MVP

## Re: Filtering and comparing two month year

My bad, you need After instead of Before

ceil( Sum([Total Amount])/Sum([Actual Weight]),0.01) - After(ceil( Sum([Total Amount])/Sum([Actual Weight]),0.01))

15 Replies
MVP

## Re: Filtering and comparing two month year

May be using Before function

CostPerKgExpression - Before(CostPerKgExpression)

Missing Manual - Before() and After()

New Contributor

## Re: Filtering and comparing two month year

Thanks for the response. How do I do generate the calculated column in the pivot table?

MVP

## Re: Filtering and comparing two month year

Not sure I understand your question?

New Contributor

## Re: Filtering and comparing two month year

I was hoping to create a new column in the pivot like below. Thanks.

MVP

## Re: Filtering and comparing two month year

Just add a new measure like this

CostPerKgExpression - Before(CostPerKgExpression)

Make sure to replace the CostPerKgExpression above with the expression you have for CostPerKg..

Does this make sense?

New Contributor

## Re: Filtering and comparing two month year

Cost Per Kg is actually Cost/Weight.

When I added measure of Cost Per Kg Delta with Expression: ceil( Sum([Total Amount])/Sum([Actual Weight]),0.01)-Before(ceil( Sum([Total Amount])/Sum([Actual Weight]),0.01))

The other month would not show up, this is how it looked like

MVP

## Re: Filtering and comparing two month year

You still have 2017-02 selected for your chart right?

New Contributor

## Re: Filtering and comparing two month year

Yes. I still have it selected.

MVP

## Re: Filtering and comparing two month year

Not sure... would you be able to share a sample?