spam (version 2.5-1)

rowSums: Form Row and Column Sums and Means

Description

Form row and column sums and means for sparse '>spam matrices

Usage

rowSums(x, na.rm = FALSE, dims = 1, …)
colSums(x, na.rm = FALSE, dims = 1, …)
rowMeans(x, na.rm = FALSE, dims = 1, …)
colMeans(x, na.rm = FALSE, dims = 1, …)

Arguments

x

a '>spam object

na.rm

currently ignored

dims

ignored as we have only two dimensions.

…

potentially further arguments from other methods.

Value

Vector of appropriate length.

Details

Depending on the flag .

See Also

apply.spam, spam.options.

Examples

# NOT RUN {
x <- spam( rnorm(20), 5, 4)
rowSums( x)
c( x %*% rep(1,4))
# }