Create new variable using same columns

[#1]

I have my data set like this

Vendor	Quarter	Current quarter
Market	Q3 2013	100
Market	Q2 2013	200
Market	Q1 2013	300
Market	Q4 2013	100
Market	Q3 2013	200
Market	Q2 2013	300
Market	Q1 2013	100
Market	Q4 2013	200

I want new variable "Growth" so that  , growth of Q4 will be calculated from Current quater. and like wise for other quaters as well..

for ex. growth= q4/q3-1

[sundarakumar]

If you want this calculation to happen at back end then you have to add a group by to the table to group data at quarter level and sort it in ascending order then use previous function to calculate it as a Field.

If you want the same in variable you will have to do group by and capture the details to a varialbe with peek function.

But the simplest way should be to do it in the front end like sum({<Quarter={'current_quarter'}>}sales)/sum({<Quarter={'previous_quarter'}>}sales). -1

can you explain why you want it in a variable?

-Sundar

[#3]

I need a separate variable ...doing it for the ease of use to see the growth rate.

I didn't get your 1st two lines....can you show what are you trying to say?

I am new to this.

[sundarakumar]

PFA the sample. It shows the exaple where the requirement is handled in script.

But it is better to be calcualted in the front end like (in a text box)

=(sum({<Quarter={'2015 Q4'}>}sales)/sum({<Quarter={'2015 Q3'}>}sales))-1

-Sundar