Counts the number of features

Returns the number of non-NA features in a features by sample matrix.

Usage

colCounts(x, ...)

Arguments

x

A matrix of mode numeric.

...

Currently ignored.

Value

A numeric vector of length identical to ncol(x).

See also

Other Quantitative feature aggregation: aggregate(), medianPolish(), robustSummary()

Author

Laurent Gatto

Examples

m <- matrix(c(1, NA, 2, 3, NA, NA, 4, 5, 6),
            nrow = 3)
colCounts(m)
#> [1] 2 1 3
m <- matrix(rnorm(30), nrow = 3)
colCounts(m)
#>  [1] 3 3 3 3 3 3 3 3 3 3