colDiffs {DelayedMatrixStats} | R Documentation |
Calculates difference for each row (column) in a matrix.
colDiffs(x, rows = NULL, cols = NULL, lag = 1L, differences = 1L, dim. = dim(x), ...) rowDiffs(x, rows = NULL, cols = NULL, lag = 1L, differences = 1L, dim. = dim(x), ...) ## S4 method for signature 'DelayedMatrix' colDiffs(x, rows = NULL, cols = NULL, lag = 1L, differences = 1L, dim. = dim(x), force_block_processing = FALSE, ...) ## S4 method for signature 'DelayedMatrix' rowDiffs(x, rows = NULL, cols = NULL, lag = 1L, differences = 1L, dim. = dim(x), force_block_processing = FALSE, ...)
x |
A NxK DelayedMatrix. |
rows |
A |
cols |
A |
lag |
An |
differences |
An |
dim. |
An |
... |
Additional arguments passed to specific methods. |
force_block_processing |
|
Returns a numeric
Nx(K-1) or (N-1)xK
matrix
.
See also diff2
().
# A DelayedMatrix with a 'matrix' seed dm_matrix <- DelayedArray(matrix(c(rep(1L, 5), as.integer((0:4) ^ 2), seq(-5L, -1L, 1L)), ncol = 3)) # A DelayedMatrix with a 'HDF5ArraySeed' seed # NOTE: Requires that the HDF5Array package is installed library(HDF5Array) dm_HDF5 <- writeHDF5Array(matrix(c(rep(1L, 5), as.integer((0:4) ^ 2), seq(-5L, -1L, 1L)), ncol = 3)) colDiffs(dm_matrix) rowDiffs(dm_HDF5) # In reverse column order rowDiffs(dm_HDF5, cols = seq(ncol(dm_HDF5), 1, -1))