compOrd: Componentwise partial order relation
In isodistrreg: Isotonic Distributional Regression (IDR)

Description Usage Arguments Details Value

Compares all rows of a numeric matrix or data frame X with respect to the componentwise order. A row X[i, ] is smaller or equal to a row X[j, ] in the componentwise order, if X[i, k] <= X[j, k] for k = 1, ..., ncol(X).

1	compOrd(X)

`X`	a numeric matrix or a data frame containing numeric or ordered factor variables with at least two columns.

The columns of X are sorted sequentially: First all constraints based on only the first column X[, 1] are activated (set TRUE), then constraints are dropped based on the orders of the remaining columns. This avoids nrow(X)^2 / 2 pairwise comparisons.

A list containing

`paths`	a two-column matrix giving all pairs of indices `(i,j)` which satisfy `all(X[i, ] <= X[j, ])`.
`colOrder`	a matrix of the columnwise orders of `X`. Used to compute paths and required for other function calls.