rcl {terra}

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]