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A simple ggplot2 scatterplot

Here’s a bit of code used to produce one of the figures in my recent paper dealing with modeling rocky intertidal snail body temperatures. This was my first foray into ggplot2, and it only involved a few hours of head-scratching. The plot is a comparison of 10 years of  daily maximum body temperatures of a modeled littorine snail sitting on a rock with its foot out on the rock or withdrawn into the shell. The original data are here: dailymax_runs139_169.

The code below will open the data file, create the ggplot2 figure, and save the output … Continue Reading

Modifying basic plots in R

Below is a walk-through of some of the basics of customizing plots in R. These are all based on the graphics package that comes in the base installation of R.

Let’s start by making a basic plot in R. In the code snippets below, green text behind a # sign is considered comments by R, so everything after a # sign on a line will be ignored by R. We’ll call the plot command and supply it with two vectors of numbers representing the x and y values:

plot(c(1,2,3,4,5,6),c(4,3,6,2,1,1)) #x and y data for our example plot

which produces this plot:

[caption … Continue Reading