spatstat (version 1.9-4)

quantile.im: Sample Quantiles of Pixel Image

Description

Compute the sample quantiles of the pixel values of a given pixel image.

Usage

## S3 method for class 'im':
quantile(x, \dots)

Arguments

x

A pixel image. An object of class "im".

...

Optional arguments passed to quantile.default. They determine the probabilities for which quantiles should be computed. See quantile.default

Value

• A vector of quantiles.

Details

This simple function applies the generic quantile operation to the pixel values of the image x.

This function is a convenient way to inspect an image and to obtain summary statistics. See the examples.

See Also

quantile, cut.im, im.object

Examples

# artificial image data
Z <- setcov(square(1))

# find the quartiles
quantile(Z)

# find the deciles
quantile(Z, probs=(0:10)/10)