Generate CountSketch random matrix
CountSketch(nsketch, ncells, seed = NA_integer_, ...)...
Number of sketching random cells
Number of cells in the original data
a single value, interpreted as an integer, or NULL
(see ‘Details’).
Ignored
Clarkson, KL. & Woodruff, DP. Low-rank approximation and regression in input sparsity time. Journal of the ACM (JACM). 2017 Jan 30;63(6):1-45. https://dl.acm.org/doi/abs/10.1145/3019134;