compare: Compare Raster objects
In raster: Geographic Data Analysis and Modeling

compareRaster

R Documentation

Compare Raster objects

Description

Evaluate whether a two or more Raster* objects have the same extent, number of rows and columns, projection, resolution, and origin (or a subset of these comparisons).

all.equal is a wrapper around compareRaster with options values=TRUE, stopiffalse=FALSE and showwarning=TRUE.

Usage

compareRaster(x, ..., extent=TRUE, rowcol=TRUE, crs=TRUE, res=FALSE, orig=FALSE,
         rotation=TRUE, values=FALSE, tolerance, stopiffalse=TRUE, showwarning=FALSE)

Arguments

`x`	Raster* object
`...`	Raster* objects
`extent`	logical. If `TRUE`, bounding boxes are compared
`rowcol`	logical. If `TRUE`, number of rows and columns of the objects are compared
`crs`	logical. If `TRUE`, coordinate reference systems are compared.
`res`	logical. If `TRUE`, resolutions are compared (redundant when checking extent and rowcol)
`orig`	logical. If `TRUE`, origins are compared
`rotation`	logical. If `TRUE`, rotations are compared
`values`	logical. If `TRUE`, cell values are compared
`tolerance`	numeric between 0 and 0.5. If not supplied, the default value is used (see `rasterOptions`. It sets difference (relative to the cell resolution) that is permissible for objects to be considered 'equal', if they have a non-integer origin or resolution. See all.equal.
`stopiffalse`	logical. If `TRUE`, an error will occur if the objects are not the same
`showwarning`	logical. If `TRUE`, an warning will be given if objects are not the same. Only relevant when `stopiffalse` is `TRUE`

Examples

r1 <- raster()
r2 <- r1
r3 <- r1
compareRaster(r1, r2, r3)
nrow(r3) <- 10

# compareRaster(r1, r3)
compareRaster(r1, r3, stopiffalse=FALSE)
compareRaster(r1, r3, rowcol=FALSE)

all.equal(r1, r2)
all.equal(r1, r3)

raster documentation built on April 4, 2025, 5:34 a.m.