### Formula for working out change in data series

Posted:

**Mon Oct 24, 2016 4:04 pm**Hi,

Wondering if someone knew and could help me find an expression to calculate the three month change (actual change, not percentage change) in a monthly data series? I had a search online and in the programming user guide but couldn't work it out. Thanks so much!

Regards,

Michael Anthonisz

Wondering if someone knew and could help me find an expression to calculate the three month change (actual change, not percentage change) in a monthly data series? I had a search online and in the programming user guide but couldn't work it out. Thanks so much!

Regards,

Michael Anthonisz