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Function for generating the n-period absolute change
chgr(x, n = 1)
The time series for the change to be calculated.
The period for the growth to be calculated over.
The n-period change of the time series.
In order to ensure the change calculated is reliable, the following rule are applied.
50% of the data must be present.
The length of the time series must be greater than n
Otherwise the growth will not be computed.
# NOT RUN { test.ts = abs(rnorm(100)) chgr(test.ts, 1) chgr(test.ts, 3) chgr(test.ts, 10) # }
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