Description Usage Arguments Details Value Author(s) See Also Examples
Calculates the product for each row (column) of a matrixlike object.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31  ## S4 method for signature 'DelayedMatrix'
colProds(
x,
rows = NULL,
cols = NULL,
na.rm = FALSE,
method = c("direct", "expSumLog"),
force_block_processing = FALSE,
...
)
## S4 method for signature 'SolidRleArraySeed'
colProds(
x,
rows = NULL,
cols = NULL,
na.rm = FALSE,
method = c("direct", "expSumLog"),
...
)
## S4 method for signature 'DelayedMatrix'
rowProds(
x,
rows = NULL,
cols = NULL,
na.rm = FALSE,
method = c("direct", "expSumLog"),
force_block_processing = FALSE,
...
)

x 
A NxK DelayedMatrix. 
rows 
A 
cols 
A 
na.rm 
If 
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. 
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()
.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16  # 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)

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