extract {ftsa}

Extract variables or observations

Description

Creates subsets of a fts object.

Usage

extract(data, direction = c("time", "x"), timeorder, xorder)

Arguments

data

An object of fts.

direction

In time direction or x variable direction?

timeorder

Indexes of time order.

xorder

Indexes of x variable order.

Value

When xorder is specified, it returns a fts object with same argument as data but with a subset of x variables.

When timeorder is specified, it returns a fts object with same argument as data but with a subset of time variables.

Author(s)

Han Lin Shang

Examples

# ElNino is an object of class sliced functional time series.
# This function truncates the data series rowwise or columnwise.	
extract(data = ElNino_ERSST_region_1and2, direction = "time", 
	timeorder = 1980:2006) # Last 27 curves
extract(data = ElNino_ERSST_region_1and2, direction = "x", 
	xorder = 1:8) # First 8 x variables