Coerce an Object to imgClass

Converts an object of class rdClass or fdClass to an imgClass, while preserving or overriding associated attributes such as smoothing, sparsity, and grid points.

Usage

as.imgClass(
  x,
  Sparsity_parameter = NULL,
  Smoothing_parameter = NULL,
  argval = NULL
)

Arguments

x

An object of class rdClass or fdClass.

Sparsity_parameter

Optional. A numeric vector of non-negative integers representing sparsity levels to apply. If NULL, the parameter is inherited from x.

Smoothing_parameter

Optional. A numeric value or vector representing smoothing parameters. If NULL, the parameter is inherited from x.

argval

Optional. A numeric vector of grid points (argvals) for functional representation. If NULL, the grid is inherited from x.

Value

An object of class imgClass, which also inherits from fdClass or rdClass, depending on the smoothing parameter.

Details

This coercion is helpful when an object originally treated as regular or functional data (via rdClass or fdClass) should instead be interpreted and processed as image data.

Examples

mat <- matrix(rnorm(100), nrow = 10, ncol = 10)
fd_obj <- fdClass(mat, Smoothing_parameter = 0.1)
img_obj <- as.imgClass(fd_obj)
print(class(img_obj))              # "imgClass" "fdClass"
#> [1] "imgClass" "fdClass" 
print(attr(img_obj, "Smoothing_parameter"))
#> [1] 0.1