compare: Compare Raster objects

In raster: Geographic Data Analysis and Modeling

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)

Example output

Loading required package: sp
[1] TRUE
[1] FALSE
[1] TRUE
[1] TRUE
[1] FALSE
Warning message:
In compareRaster(target, current, ..., values = values, stopiffalse = stopiffalse,  :
  different number or rows

raster documentation built on Jan. 5, 2021, 3:01 a.m.