R users,
I am a beginner in R.  I have a time series data on various macro variables
like GDP, unemployment rate, consumer spending, imports, exports etc. I am
interested in calculating  year over year growth rate for each of those
variables. Is there any simple function in R for carrying out such repeated
operations.

I would like to carry out growth rate between two consecutive yearly row
data and also between current quarter and previous years quarterly value.

any help would be highly appreciated,

thanks in advance.

srinivas
statistical analyst

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