colProds,DelayedMatrix-method {DelayedMatrixStats} | R Documentation |
Calculates the product for each row (column) of a matrix-like object.
## S4 method for signature 'DelayedMatrix' colProds( x, rows = NULL, cols = NULL, na.rm = FALSE, method = c("direct", "expSumLog"), force_block_processing = FALSE, ..., useNames = NA ) ## S4 method for signature 'SolidRleArraySeed' colProds( x, rows = NULL, cols = NULL, na.rm = FALSE, method = c("direct", "expSumLog"), ..., useNames = NA ) ## S4 method for signature 'DelayedMatrix' rowProds( x, rows = NULL, cols = NULL, na.rm = FALSE, method = c("direct", "expSumLog"), force_block_processing = FALSE, ..., useNames = NA )
x |
A NxK DelayedMatrix. |
rows |
A |
cols |
A |
na.rm |
|
method |
A character vector of length one that specifies the how the product is calculated. Note, that this is not a generic argument and not all implementation have to provide it. |
force_block_processing |
|
... |
Additional arguments passed to specific methods. |
useNames |
If |
The S4 methods for x
of type matrix
,
array
, or numeric
call
matrixStats::rowProds
/ matrixStats::colProds
.
Returns a numeric
vector
of length N (K).
Peter Hickey
matrixStats::rowProds()
and
matrixStats::colProds()
which are used
when the input is a matrix
or numeric
vector.
For sums across rows (columns), see
rowSums2()
(colSums2()
)
base::prod()
.
# 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)) colProds(dm_matrix) rowProds(dm_matrix)