| rowCollapse {MatrixGenerics} | R Documentation |
Extract one cell from each row (column) of a matrix-like object.
rowCollapse(x, idxs, rows = NULL, ..., useNames = NA) ## S4 method for signature 'matrix_OR_array_OR_table_OR_numeric' rowCollapse(x, idxs, rows = NULL, dim. = dim(x), ..., useNames = NA) ## S4 method for signature 'ANY' rowCollapse(x, idxs, rows = NULL, ..., useNames = NA) colCollapse(x, idxs = idxs, cols = NULL, ..., useNames = NA) ## S4 method for signature 'matrix_OR_array_OR_table_OR_numeric' colCollapse(x, idxs, cols = NULL, dim. = dim(x), ..., useNames = NA) ## S4 method for signature 'ANY' colCollapse(x, idxs = idxs, cols = NULL, ..., useNames = NA)
x |
An NxK matrix-like object. |
idxs |
An index |
rows, cols |
A |
... |
Additional arguments passed to specific methods. |
useNames |
If |
dim. |
An |
The S4 methods for x of type matrix,
array, or numeric call
matrixStats::rowCollapse
/ matrixStats::colCollapse.
Returns a numeric vector of length N (K).
matrixStats::rowCollapse()
and matrixStats::colCollapse()
which are used when the input is a matrix or numeric vector.
mat <- matrix(rnorm(15), nrow = 5, ncol = 3) mat[2, 1] <- NA mat[3, 3] <- Inf mat[4, 1] <- 0 print(mat) rowCollapse(mat, idxs = 2) rowCollapse(mat, idxs = c(1,1,2,3,2)) colCollapse (mat, idxs = 4)