ReducedMatrix: Matrix reduction

In SpotSampling: SPatial and Optimally Temporal (SPOT) Sampling

Description

Reduce a matrix by removing alternatively columns and rows that sum to 0. If the matrix is dense or if every columns sum to more than 0, then nothing is changed.

Usage

ReducedMatrix(B)

Arguments

B	a matrix that contains lot of 0s.

Value

Returns a list including:

BB the reduced matrix of B.

ind_col a vector that contains the index of the remaining columns of B in BB.

ind_row a vector that contains the index of the remaining rows of B in BB.

Author(s)

Raphael Jauslin [e-mail]

Examples

set.seed(1)
B  <- matrix(sample(c(0,0,0,1),80,replace=TRUE), nrow = 8, ncol =  10)
ReducedMatrix(B)

SpotSampling documentation built on Oct. 26, 2020, 5:08 p.m.