R: Minimum and maximum values

extremeValues {raster} | R Documentation

## Minimum and maximum values

### Description

Returns the minimum or maximum value of a RasterLayer or layer in a RasterStack

### Usage

    minValue(x, ...)
    maxValue(x, ...)

### Arguments

`x` | RasterLayer or RasterStack object
`...` | Additional argument: layer number (for RasterStack or RasterBrick objects)

### Details

If a Raster* object is created from a file on disk, the min and max values are often not known (depending on the file format). You can use `setMinMax` to set them in the Raster* object.

### Value

a number

### Examples

    r <- raster()
    r <- setValues(r, 1:ncell(r))
    minValue(r)
    maxValue(r)
    r <- setValues(r, round(100 * runif(ncell(r)) + 0.5))
    minValue(r)
    maxValue(r)

    r <- raster(system.file("external/test.grd", package="raster"))
    minValue(r)
    maxValue(r)

[Package raster version 2.6-7 Index]