rcl: Combine row, column, and layer numbers

In terra: Spatial Data Analysis

Combine row, column, and layer numbers

Description

Get a matrix with the combination of row, column, and layer numbers

Usage

## S4 method for signature 'SpatRaster'
rcl(x, row=NULL, col=NULL, lyr=NULL)

Arguments

x	SpatRaster
row	positive integer that are row number(s), a list thereof, or NULL for all rows
col	as above for columns
lyr	as above for layers

Details

If a list is used for at least one of row, col or lyr, these are evaluated in parallel. That is combinations are made for each list element, not across list elements. If, in this case another argument is not a list it has to have either length 1 (used for all cases) or have the same length as the (longest) list, in which case the value is coerced into a list with as.list

If multiple arguments are a list but they have different lengths, theyare recycled to the longest list.

Value

matrix

See Also

rowColCombine, cellFromRowCol

Examples

x <- rast(ncol=5, nrow=5, nlyr=2)
values(x) <- 1:size(x)

rcl(x, 1, 2:3, 1:2)

i <- rcl(x, 1, list(1:2, 3:4), 1:2)
i

# get the values for these cells
x[i]

terra documentation built on April 12, 2025, 1:43 a.m.