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spatstat.geom (version 3.3-3)

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 im
quantile(x, ...)

Value

A vector of quantiles.

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.

Author

Adrian Baddeley Adrian.Baddeley@curtin.edu.au

and Rolf Turner rolfturner@posteo.net

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

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

# find the quartiles
quantile(Z)

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

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