Form Row and Column Sums and Means
Form row and column sums and means for sparse arrays (currently
simple_triplet_matrix only).
row_sums(x, na.rm = FALSE, dims = 1, ...) col_sums(x, na.rm = FALSE, dims = 1, ...) row_means(x, na.rm = FALSE, dims = 1, ...) col_means(x, na.rm = FALSE, dims = 1, ...) ## S3 method for class 'simple_triplet_matrix' row_sums(x, na.rm = FALSE, dims = 1, ...) ## S3 method for class 'simple_triplet_matrix' col_sums(x, na.rm = FALSE, dims = 1, ...) ## S3 method for class 'simple_triplet_matrix' row_means(x, na.rm = FALSE, dims = 1, ...) ## S3 method for class 'simple_triplet_matrix' col_means(x, na.rm = FALSE, dims = 1, ...)
x |
a sparse array containing numeric, integer, or logical values. |
na.rm |
logical. Should missing values (including |
dims |
currently not used for sparse arrays. |
... |
currently not used for sparse arrays. |
Provides fast summation over the rows or columns of sparse matrices in
simple_triplet-form.
A numeric (double) array of suitable size, or a vector if the result
is one-dimensional. The dimnames (or names for a vector
result) are taken from the original array.
Results are always of storage type double to avoid (integer)
overflows.
Christian Buchta
simple_triplet_matrix, colSums for dense
numeric arrays.
## x <- matrix(c(1, 0, 0, 2, 1, NA), nrow = 3) x s <- as.simple_triplet_matrix(x) row_sums(s) row_sums(s, na.rm = TRUE) col_sums(s) col_sums(s, na.rm = TRUE)
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