Kernel Density Plot

In cholera: Amend, Augment and Aid Analysis of John Snow's Cholera Map

knitr::opts_chunk$set(collapse = TRUE, comment = ">")
library(cholera)

By default, the addKernelDensity() function pools all observations:

snowMap()
addKernelDensity()

snowMap()
addKernelDensity(multi.core = FALSE)

However, this presuppose that all cases have a common source. To consider the possible existence of multiple pump neighborhoods, the function provides two ways to explore hypothetical scenarios.

By using the pump.select argument, you can define a "population" of pump neighborhoods by specify the pumps to consider:

snowMap()
addKernelDensity(pump.select = c(6, 8))

snowMap()
addKernelDensity(pump.select = c(6, 8), multi.core = FALSE)

By using the pump.subset argument, you can define the subset of the "population" to consider:

snowMap()
addKernelDensity(pump.subset = c(6, 8))

snowMap()
addKernelDensity(pump.subset = c(6, 8), multi.core = FALSE)

cholera documentation built on March 7, 2023, 5:31 p.m.