Plot the empirical distribution of runs

Plot the empirical distribution of runs

Usage

# S3 method for class 'sprunstest'
plot(x, ...)

Arguments

x

A object of class sprunstest.

...

further arguments passed to or from other methods.

Value

No return value, called for side effects

Details

Plot the histogram with the empirical distribution of the runs

See also

sp.runs.test.

Author

Fernando López	fernando.lopez@upct.es
Román Mínguez	roman.minguez@uclm.es
Antonio Páez	paez@gmail.com
Manuel Ruiz	manuel.ruiz@upct.es

Examples

# Example 1: Fastfood example. sf (points)
data("FastFood.sf")
x <- sf::st_coordinates(sf::st_centroid(FastFood.sf))
listw <- spdep::knearneigh(x, k = 2)
formula <- ~ Type
srq <- sp.runs.test(formula = formula, data = FastFood.sf, listw = listw, nsim = 299)
plot(srq)


# Example 2: Spain example (poligons with 0 neinghbourhood)
data("provinces_spain")
sf::sf_use_s2(FALSE)
listw <- spdep::poly2nb(as(provinces_spain,"Spatial"), queen = FALSE)
#> although coordinates are longitude/latitude, st_intersects assumes that they
#> are planar
#> Warning: some observations have no neighbours;
#> if this seems unexpected, try increasing the snap argument.
#> Warning: neighbour object has 4 sub-graphs;
#> if this sub-graph count seems unexpected, try increasing the snap argument.
provinces_spain$Older <- cut(provinces_spain$Older, breaks = c(-Inf,19,22.5,Inf))
levels(provinces_spain$Older) = c("low","middle","high")
formula <- ~ Older
srq <- sp.runs.test(formula = formula, data = provinces_spain, listw = listw, nsim = 299)
#> Warning: st_centroid assumes attributes are constant over geometries
#> Warning: st_centroid does not give correct centroids for longitude/latitude data
plot(srq)

provinces_spain$Mal2Fml <- factor(provinces_spain$Mal2Fml > 100)
levels(provinces_spain$Mal2Fml) = c("men","woman")
formula <- ~ Mal2Fml
srq <- sp.runs.test(formula = formula, data = provinces_spain, listw = listw, nsim = 299)
#> Warning: st_centroid assumes attributes are constant over geometries
#> Warning: st_centroid does not give correct centroids for longitude/latitude data
plot(srq)