For Some Definition of “Directly” and/or “Contort”

September 30, 2015
By

(This article was first published on rud.is » R, and kindly contributed to R-bloggers)

Junk Charts did a post on Don’t pick your tool before having your design and made a claim that this:

6a00d8341e992c53ef01b7c7d60168970b-300wi

“cannot be produced directly from a tool (without contorting your body in various painful locations)”.

I beg to differ.

With R & ggplot2, I get to both pick my tool and design at the same time since I have a very flexible and multi-purpose tool. I also don’t believe that the code below qualifies as “contortions”, though I am a ggplot2 fanboi. It’s no different than Excel folks clicking on radio buttons and color pickers, except my process is easily repeatable & scalable once finalized (this is not finalized as it’s not 100% parameterized but it’s not difficult to do that last part).

library(ggplot2)
 
dat <- data.frame(year=2010:2015,
                  penalties=c(627, 625, 653, 617, 661, 730))
 
avg <- data.frame(val=mean(head(dat$penalties, -1)),
                  last=dat$penalties[6],
                  lab="5-YrnAvg")
 
gg <- ggplot(dat, aes(x=year, y=penalties))
gg <- gg + geom_point()
gg <- gg + scale_x_continuous(breaks=c(2010, 2014, 2015), limits=c(NA, 2015.1))
gg <- gg + scale_y_continuous(breaks=c(600, 650, 700, 750), 
                              limits=c(599, 751), expand=c(0,0))
gg <- gg + geom_segment(data=avg, aes(x=2010, xend=2015, y=val, yend=val), linetype="dashed")
gg <- gg + geom_segment(data=avg, aes(x=2015, xend=2015, y=val, yend=last), color="steelblue")
gg <- gg + geom_point(data=avg, aes(x=2015, y=val), shape=4, size=3)
gg <- gg + geom_text(data=avg, aes(x=2015, y=val), label="5-YrnAvg", size=2.5, hjust=-0.3)
gg <- gg + geom_point(data=avg, aes(x=2015, y=700), shape=17, col="steelblue")
gg <- gg + geom_point(data=avg, aes(x=2015, y=730), shape=4, size=3)
gg <- gg + labs(x=NULL, y="Number of Penalties", 
                title="NFL Penalties Jumped 15% in thenFirst 3 Weeks of the 2015 Seasonn")
gg <- gg + theme_bw()
gg <- gg + theme(panel.grid.minor=element_blank())
gg <- gg + theme(panel.grid.major.x=element_blank())
gg <- gg + theme(panel.grid.major.y=element_line(color="white"))
gg <- gg + theme(panel.background=element_rect(fill="#f3f2f7"))
gg <- gg + theme(axis.ticks=element_blank())
gg

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