NEWS.md
In fabnavarro/gasper: Graph Signal Processing

gasper News

gasper 1.1.6 (02/28/2024)

add SuiteSparseData data frame mirrors the structure presented on the SuiteSparse Matrix Collection website. Enables now easily query and download specific matrices directly from the Collection.
add GSP intro in vignettes

change b by beta in betathresh and SUREThresh to avoid confusion with the parameter that control the number of scales in other functions.
add Level dependent SURE thresholding LD_SUREthresh.
add graph Fourier transform functions forward_gft/inverse_gft.
add spectral_coords function to compute spectral coordinates of a graph using the two smallest non-zero eigenvalues of the graph Laplacian.
add random walk and normalized Laplacian matrix to laplacian_mat (keep unnormalized as default).
add more info in doc.
add localize_gft/localize_sgwt fun.
add custom frame filters support (in forward/inverse_sgwt, HPFVN, plot_filter and tight_frame) by passing additional arguments (filter_params/filter_func).
add get_graph_info to retrieve from SuiteSparse the two/three tables with “Matrix Information,” “Matrix Properties” and, if available, “SVD Statistics”.
change info output in dowload_graph to temp to access temp dir instead.
add optional logical argument svd to fetch singular values is needed and provided.

satisfy CRAN policy: ‘Packages which use Internet resources should fail gracefully with an informative message if the resource is not available or has changed (and not give a check warning nor error).’
CRAN resubmission.

correction of an error in laplacian_mat function (in the case of full matrix input).
replace graphname by matrixname (matrices in the SuiteSparse are not necessarily adjacency matrices).
error correction in SNR fun (wrong output for matrices)
add Peak Signal to Noise Ratio (PNSR) function.

fix bug in download_graph function for downloading graph matrix without coordinates.
add citation info issue#1.
bibliography of SURE paper updated in the vignettes.
add boolean argument allowing to export the coefficients of the frame after thresholding (TRUE by default) in SURE*thresh functions (FALSE save memory allocation for large graphs).
add a new output dim to download_graph providing a url to a temporary file containing the information about the considered matrix.
add new argument to randsignal to avoid full spectrum calculation.
add new import (methods, Matrix, RSpectra) to consider large sparse matrices.
modify randsignal to benefit from sparse computation (much faster).
add SNR function (to remove rwavelet import used only in vignettes)
add a new output dim to download_graph providing the numbers of rows, columns and numerically nonzero elements of the sparse matrix.
add Matrix Market files import (remove data.frame storage to save a lot of memory and speed-up computation) to download_graph.
add fast forward/inverse sgwt functions (foward_sgwt and inverse_sgwt). Faster than calculation via tight_frame/analysis and potentially useful when frame elements do not need to be calculated.
add graph extension of the Von Neummann variance estimator using finest scale coefficients (HPFVN).
add kernel tight-frame evaluation function zetav (to avoid redundancy).
add new plot_filter function (plot wavelet tight-frame functions).

fix warnings bug SUREthresh functions.
adapt DESCRIPTION to meet CRAN’s expectations (i.e., omit the redundant “in R” from the title, use the Authors@R field and declare Maintainer, Authors and Contributors with their appropriate roles with person() calls, do not start the description with “This package”, package name, title or similar. Just start with “Provides …” or similar, do not start the description with “This package”, package name, title or similar).
optionally specify a RNG seed (for reproducible experiments) in swissroll.R.
remove adjacency_mat N arg.
CRAN resubmission.