Subset of time series from the M Competitions

subset.Mcomp returns a subset of the time series data from the M Competitions. Subsets can be for specific periods, or specific types of data or both.

Usage

# S3 method for Mcomp
subset(x, cond1, cond2, ...)

Arguments

x: M-competition data or a subset of M-competition data
cond1: Type or period of the data. Type is a character variable and period could be character or numeric.
cond2: Optional second condition specifying type or period of the data, depending on cond1. If cond1 denotes type then cond2 would denote period, but if cond1 denotes period then cond2 would denote type.
...: Other arguments.

Value

An object of class Mcomp consisting of the selected series.

Details

Possible values for cond1 and cond2 denoting period are 1, 4, 12, "yearly", "quarterly", "monthly" and "other".

If cond1 or cond2 equals 111, then the 111 series used in the extended comparisons in the 1982 M-competition are selected.

Possible values for cond1 and cond2 denoting type are "macro", "micro", "industry", "finance", "demographic", "allother", "macro1", "macro2", "micro1", "micro2", "micro3". These correspond to the descriptions used in the competitions. See the references for details.

Partial matching used for both conditions.

References

Makridakis, S., A. Andersen, R. Carbone, R. Fildes, M. Hibon, R. Lewandowski, J. Newton, E. Parzen, and R. Winkler (1982) The accuracy of extrapolation (time series) methods: results of a forecasting competition. Journal of Forecasting, 1, 111--153.

Makridakis and Hibon (2000) The M3-competition: results, conclusions and implications. International Journal of Forecasting, 16, 451-476.

Author

Muhammad Akram and Rob Hyndman

Examples


M3.quarterly <- subset(M3,4)
M1.yearly.industry <- subset(M1,1,"industry")