Creating a difference measure on a time series

[jleefjcapital]

Hello,

I'm trying to create a difference measure on a time series where I would like to most current period to represent the change over the previous period.   For instance, if the original time series is as follows:

2015    10

2014      8

2013     5

2012    4

I would like to create a new series:

2015    2

2014    3

2013    1

How would I go about doing this? 

Thank you,

[sunny_talwar]

Not sure why you don't see it. May be Sara Leslie can look into this.

Best,

Sunny