calculating witin a dataset the proportional increase or decrease

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calculating witin a dataset the proportional increase or decrease

Hassan Taweel
Dear List,
 
I have a dataset with 2 periods and 4 treatments, i would like to get a table and or a graph for the proportional increase or decrease due to the treatment.
Example
 
period    treatment       response
1              1                10
1              2                 11
1              3                 11
1              4                 13
1              1
1              2
1              3
1              4
2              1
2              2
2              3
2              4
2              1
2              2
2              3
2              4
 
 
Now the idea is to get a table or a graph with the calculated proportional increase or decrease for every treatment that is for treatment 1:
 
(av treatment 1 period 2 - av treatment 1 period 1)/ av treatment 1 period 1
 
 
Regards
 
Hassan
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