edf0s {ShapeSelectForest}

A 21 by 7 Matrix Storing Edf0 Vectors

Description

The object "edf0s" is a 21 by 7 matrix. Each row is an edf0 vector of 7 elements corresponding to the 7 shapes in this package. Such a vector will be used in the main routine "shape" to select the best shape for a scatterplot of Landsat signals. Each edf0 vector is simulated through a subroutine called "getedf0", using a total of 1000 simulations with the random seed being set to 123. Each row is an edf0 vector for an equally spaced \bold{x} vector of n elements (e.g., years). From the first row to the last row, the edf0 vector is for a predictor vector \bold{x} of length n which is an integer ranging from 20 to 40. The matrix is built for the convenience of users when they call the routine "shape".

If the \bold{x} vector is equally spaced and its number of elements n is between 20 and 40, then a corresponding edf0 vector will be extracted directly from this matrix and no simulation will be done, which saves a lot of time; otherwise, the subroutine "getedf0" will be called inside the routine "shape" to get an edf0 vector for \bold{x}. The timing depends on the number of elements in \bold{x} and the shape options allowed by the user. For example, when \bold{x} is an equally spaced vector of 26 elements, the timing is about 167 seconds if the user allows a double-jump shape and the timing is about 12 seconds if the user doesn't allow a double-jump shape. Also, when \bold{x} is not an equally spaced vector, no matter how many elements it has, "getedf0" should be called.

Usage

data("edf0s")

Format

A 21 by 7 matrix.

See Also

shape, ShapeSelectForest-package