rowOrderStats: Gets an order statistic for each row (column) in a matrix
In matrixStats: Methods that apply to rows and columns of a matrix

Description Usage Arguments Details Value Missing values Author(s) See Also

Gets an order statistic for each row (column) in a matrix.

1 2	rowOrderStats(x, which, ...) colOrderStats(x, which, ...)

`x`	A `numeric` NxK `matrix`.
`which`	An `integer` index in [1,K] ([1,N]) indicating which order statistic to be returned.
`...`	Not used.

The implementation of rowOrderStats() is optimized for both speed and memory. To avoid coercing to doubles (and hence memory allocation), there is a unique implementation for integer matrices. Currently, colOrderStats(x) is calling rowOrderStats(t(x)).

Returns a numeric vector of length N (K).

This method does not handle missing values, that is, the result corresponds to having na.rm=FALSE (if such an argument would be available).

The native implementation of rowOrderStats() was adopted by Henrik Bengtsson from Robert Gentleman's rowQ() in the Biobase package.

See rowMeans() in colSums().

matrixStats documentation built on May 2, 2019, 4:52 p.m.