R: Nine-bump spatial pattern

bump.pmgram {ecodist} | R Documentation

## Nine-bump spatial pattern

### Description

An object of class mgram for use in the example for `pmgram`. Many of the functions in `ecodist` take a long time to run, so prepared examples have been included.

### Usage

    data(bump.pmgram)

### Format

See `pmgram` for current format specification.

### Author(s)

Sarah Goslee

### See Also

`bump`, `pmgram`

### Examples

    data(bump)

    par(mfrow=c(1, 2))
    image(bump, col=gray(seq(0, 1, length=5)))

    z <- as.vector(bump)
    x <- rep(1:25, times=25)
    y <- rep(1:25, each=25)

    X <- col(bump)
    Y <- row(bump)
    # calculate dissimilarities for data and space
    geo.dist <- dist(cbind(as.vector(X), as.vector(Y)))
    value.dist <- dist(as.vector(bump))

    ### pgram() is time-consuming, so this was generated
    ### in advance and saved.
    ### set.seed(1234)
    ### bump.pmgram <- pmgram(value.dist, geo.dist, nperm=10000)
    ### save(bump.pmgram, file="ecodist/data/bump.pmgram.rda")

    data(bump.pmgram)
    plot(bump.pmgram)

[Package ecodist version 2.0.1 Index]