## ----setup, include=FALSE-----------------------------------------------------
library(knitr)
library(igraph)
library(grainscape)
library(raster)
library(ggplot2)

opts_chunk$set(cache = TRUE)
opts_chunk$set(echo = TRUE)

opts_chunk$set(fig.height = 3)
opts_chunk$set(fig.width = 3)
opts_chunk$set(fig.show = "hold")

options(knitr.kable.NA = "")

