functional_variable-class: Function-valued variable data.

In MECfda: Scalar-on-Function Regression with Measurement Error Correction

Function-valued variable data.

Description

A s4 class that represents data of a function-valued variable. The format is f_i(t),\ t\in\Omega=[t_0,t_0 + T] where i is the observation (subject) index, t represents the measurement (time) points.

Slots

X

a matrix (x_{ij})_{n\times m}, where x_{ij} = f_i(t_j), represents the value of f_i(t_j), each row represent an observation (subject), each column is corresponding to a measurement (time) point.

t_0

start of the domain (time period), t_0. Default is 0.

period

length of the domain (time period), T. Default is 1.

t_points

sequence of the measurement points, (t_1,\dots,t_m). Default is t_k = t_0 + \frac{(2k-1)T}{2(m+1)}.

Author(s)

Heyang Ji

Examples

X = array(rnorm(12),dim = 4:3)
functional_variable(X=X,period = 3)

MECfda documentation built on April 3, 2025, 10:07 p.m.