Computes the cost from the sample of points on the estimated ridge and the matrix used in the reconstruction of the original signal, using simple trapezoidal rule for integrals.
fastgkernel(node, phinode, freqstep, scale, x.inc=1, x.min=node[1],
x.max=node[length(node)], plot=FALSE)values of the variable b for the nodes of the ridge
values of the frequency variable \(\omega\) for the nodes of the ridge
sampling rate for the frequency axis
size of the window
step unit for the computation of the kernel.
minimal value of x for the computation of \(G_2\).
maximal value of x for the computation of \(G_2\).
if set to TRUE, displays the modulus of the matrix of \(G_2\).
matrix of the \(G_2\) kernel.
Uses trapezoidal rule (instead of Romberg's method) to evaluate the kernel.
See discussions in the text of ``Time-Frequency Analysis''.