Automatically enclose points in a polygon

Description

Automatically enclose points in a polygon

Usage

geom_spotlight(mapping = NULL, data = NULL, stat = "identity",
  position = "identity", na.rm = FALSE, show.legend = NA,
  inherit.aes = TRUE, ...)

Arguments

Value

adds a circle around the specified points

Examples

d <- data.frame(x=c(1,1,2),y=c(1,2,2)*100)

gg <- ggplot(d,aes(x,y))
gg <- gg + scale_x_continuous(expand=c(0.5,1))
gg <- gg + scale_y_continuous(expand=c(0.5,1))

gg + geom_spotlight(s_shape=1, expand=0) + geom_point()

gg + geom_spotlight(s_shape=0.5, expand=0.1, colour="purple") + geom_point()

gg + geom_spotlight(data=subset(d, x==1), colour="red", spread=0.02) +
  geom_point()

gg <- ggplot(mpg, aes(displ, hwy))
gg + geom_spotlight(data=subset(mpg, hwy>40)) + geom_point()

ss <- subset(mpg,hwy>30 & displ<3)

gg + geom_spotlight(data=ss, colour="blue", s_shape=.7, expand=0.07) +
  geom_point() + geom_point(data=ss, colour="blue")

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

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> library(SciencesPo)
Loading required package: ggplot2
initializing ... done

> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/SciencesPo/geom_spotlight.Rd_%03d_medium.png", width=480, height=480)
> ### Name: GeomSpotlight
> ### Title: Automatically enclose points in a polygon
> ### Aliases: GeomSpotlight geom_spotlight
> ### Keywords: datasets
> 
> ### ** Examples
> 
> d <- data.frame(x=c(1,1,2),y=c(1,2,2)*100)
> 
> gg <- ggplot(d,aes(x,y))
> gg <- gg + scale_x_continuous(expand=c(0.5,1))
> gg <- gg + scale_y_continuous(expand=c(0.5,1))
> 
> gg + geom_spotlight(s_shape=1, expand=0) + geom_point()
> 
> gg + geom_spotlight(s_shape=0.5, expand=0.1, colour="purple") + geom_point()
> 
> gg + geom_spotlight(data=subset(d, x==1), colour="red", spread=0.02) +
+   geom_point()
> 
> gg <- ggplot(mpg, aes(displ, hwy))
> gg + geom_spotlight(data=subset(mpg, hwy>40)) + geom_point()
> 
> ss <- subset(mpg,hwy>30 & displ<3)
> 
> gg + geom_spotlight(data=ss, colour="blue", s_shape=.7, expand=0.07) +
+   geom_point() + geom_point(data=ss, colour="blue")
> 
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>