colCounts,DelayedMatrix-method {DelayedMatrixStats} | R Documentation |
Count how often an element in a row (column) of a matrix-like object is equal to a value.
## S4 method for signature 'DelayedMatrix' colCounts( x, rows = NULL, cols = NULL, value = TRUE, na.rm = FALSE, force_block_processing = FALSE, ... ) ## S4 method for signature 'DelayedMatrix' rowCounts( x, rows = NULL, cols = NULL, value = TRUE, na.rm = FALSE, force_block_processing = FALSE, ... )
x |
A NxK DelayedMatrix. |
rows |
A |
cols |
A |
value |
The value to search for. |
na.rm |
|
force_block_processing |
|
... |
Additional arguments passed to specific methods. |
The S4 methods for x
of type matrix
,
array
, or numeric
call
matrixStats::rowCounts
/ matrixStats::colCounts
.
Returns a integer
vector
of length N (K).
Peter Hickey
matrixStats::rowCounts()
and
matrixStats::colCounts()
which are
used when the input is a matrix
or numeric
vector.
For checks if any element is equal to a value, see
rowAnys()
. To check if all elements are equal, see
rowAlls()
.
# 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 'DataFrame' seed dm_DF <- DelayedArray(S4Vectors::DataFrame(C1 = rep(1L, 5), C2 = as.integer((0:4) ^ 2), C3 = seq(-5L, -1L, 1L))) colCounts(dm_matrix, value = 1) # Only count those in the first 4 rows colCounts(dm_matrix, rows = 1:4, value = 1) rowCounts(dm_DF, value = 5) # Only count those in the odd-numbered rows of the 2nd column rowCounts(dm_DF, rows = seq(1, nrow(dm_DF), 2), cols = 2, value = 5)