bump.pmgram: Nine-bump spatial pattern

In phiala/ecodist: Dissimilarity-Based Functions for Ecological Analysis

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)

phiala/ecodist documentation built on Nov. 5, 2023, 10:47 a.m.