FastKRR (version 0.1.2)

print.kernel_matrix: Print method for kernel matrices

Description

Displays the top-left 6×6 portion of a kernel or approximated kernel matrix for quick inspection.

Usage

# S3 method for kernel_matrix
print(x, ...)

Value

A top-left 6x6 block of the kernel matrix to the console.

Arguments

x

An object of class kernel_matrix, which may represent either an exact kernel matrix (from make_kernel or fastkrr) or an approximated kernel matrix (from approx_kernel).

...

Additional arguments (currently ignored).

See Also

approx_kernel, fastkrr, print.approx_kernel, print.krr

Examples

# data setting
set.seed(1)
n = 1000 ; d = 1
m = 100
rho = 1
X = matrix(runif(n*d, 0, 1), nrow = n, ncol = d)
y = as.vector(sin(2*pi*X^3) + rnorm(n, 0, 0.1))


# Example for fastkrr
fit_pivoted = fastkrr(X, y,
                      kernel = "gaussian", opt = "pivoted",
                      m = 100, fastcv = TRUE, verbose = FALSE)

class(attr(fit_pivoted, "K"))
print(class(attr(fit_pivoted, "K")))

class(attr(fit_pivoted, "K_approx"))
print(class(attr(fit_pivoted, "K_approx")))


# Example for make_kernel
K = make_kernel(X, kernel = "gaussian", rho = rho)

class(K)
print(K)


# Example for make_kernel
K_rff = approx_kernel(X = X, opt = "rff", kernel = "gaussian",
                      d = d, rho = rho, n_threads = 1, m = 100)

class(attr(K_rff, "K_approx"))
print(attr(K_rff, "K_approx"))