order_matrix: Get the order of a matrix by columns, selecting some rows.
In emiliotorres/preferelation: Fill a Relationship Matrix

Description Usage Arguments Details Value Author(s) Examples

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1	order_matrix(m, cols = 1L:ncol(m), rows = 1L:nrow(m))

`m`	Matrix
`cols`	Positions or names of the columns to order.
`rows`	Integer vector with the rows to order.

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An integer vector with the order of the selected rows.

emilio

m <- data.matrix(iris[,1:4])
m[2,1] <- NA
oom <- order_matrix(m,c("Sepal.Length","Sepal.Width"))
head(m[oom,])

rows <- 1:10
oom <- order_matrix(m,c("Sepal.Length","Sepal.Width"),rows)
m[rows,][oo,]

oom <- order_matrix(m,c("Sepal.Length","Sepal.Width"))
oo <- order(m[,"Sepal.Length"],m[,"Sepal.Width"],na.last=FALSE)
all.equal(oom,oo)