double_serie: Double the length of a data series for the FAST algoritm
In fast: Implementation of the Fourier Amplitude Sensitivity Test (FAST)

Description Usage Arguments Details Value Author(s) References Examples

This function is used internally for the FAST-algorithm. It duplicates the length of a data series assuming that the second part is a mirror image of the first part

1	double_serie(x)

`x`	`x` is the data series to make longer

This function reverses the model output series from a number of model runs for the FAST analysis and appends it to the original series. The last element of the existing series is not duplicated during this process.

This is required in order to process the model run results for the FAST analysis with the fft function.

If x=c(1,2,3,4) the returned vector is c(1,2,3,4,3,2,1)

Dominik Reusser

cukier 1978

1 2	x=c(1,2,3,4) double_serie(x)

Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

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