fda (version 6.2.0)

sparse.list: Creates a list of sparse data from a matrix

Description

Creates a list with sparse data from a matrix that has NAs. The length of the list will be equal to the number of columns in the data matrix (replications)

Usage

sparse.list(data,time)

Value

a list with length dim(data)[2]. Each element of the list is a matrix with ncol > 1. The first column of each element corresponds to the point index per observation.

Arguments

data

If the set is supplied as a matrix object, the rows must correspond to argument values and columns to replications, and it will be assumed that there is only one variable per observation. If y is a three-dimensional array, the first dimension corresponds to argument values, the second to replications, and the third to variables within replications.

time

Time points where the observations where taken.

References

Ramsay, James O., Hooker, Giles, and Graves, Spencer (2009), Functional data analysis with R and Matlab, Springer, New York.

Ramsay, James O., and Silverman, Bernard W. (2005), Functional Data Analysis, 2nd ed., Springer, New York.

Ramsay, James O., and Silverman, Bernard W. (2002), Applied Functional Data Analysis, Springer, New York.

See Also

cca.fd, pda.fd