Comparing the inputs of a praislm regressionSource:
in_scatter( object, type = if (model.list(object)$include.differenciation) "changes" else "levels" )
an object of class
"changes". This defines the type of output. A differencied model can't have a scatterplot in levels.
a named matrix time series of two or three columns, one for the low-frequency serie
and the others for the high-frequency series (eventually differentiated if
tscomparison class is added to the object.
twoStepsBenchmark object, this matrix has three columns,
for the low-frequency series, the high-frequency on the regression span and
the high-frequency series on the benchmark span.
If outlier effects are estimated, the contributions of the outliers are substracted from the low-frequency series.