From dfe60077cceadabb034053615006f2d91f81538f Mon Sep 17 00:00:00 2001
From: Walmes Zeviani <walmeszeviani@gmail.com>
Date: Mon, 17 Aug 2015 20:39:30 -0300
Subject: [PATCH] Add dataset potatoyield (Pimentel, page 76).
---
data-raw/potatoyield.R | 26 ++++++++++++++++++++++++++
data/potatoyield.RData | Bin 0 -> 464 bytes
2 files changed, 26 insertions(+)
create mode 100644 data-raw/potatoyield.R
create mode 100644 data/potatoyield.RData
diff --git a/data-raw/potatoyield.R b/data-raw/potatoyield.R
new file mode 100644
index 0000000..c1b1600
--- /dev/null
+++ b/data-raw/potatoyield.R
@@ -0,0 +1,26 @@
+##----------------------------------------------------------------------
+## Data generation.
+
+potatoyield <- read.table("http://www.leg.ufpr.br/~walmes/data/pimentel_batatinha.txt",
+ header=TRUE, sep="\t")
+names(potatoyield) <- c("block", "variety", "yield")
+str(potatoyield)
+
+potatoyield <- potatoyield[with(potatoyield, order(block, variety)),]
+
+save(potatoyield, file="../data/potatoyield.RData")
+
+##----------------------------------------------------------------------
+## Examples.
+
+require(lattice)
+
+xyplot(yield~variety, data=potatoyield,
+ groups=block, type="o",
+ ylab=expression(Yield~(t~ha^{-1})),
+ xlab="Variety")
+
+rm(list=ls())
+load("../data/potatoyield.RData")
+ls()
+str(potatoyield)
diff --git a/data/potatoyield.RData b/data/potatoyield.RData
new file mode 100644
index 0000000000000000000000000000000000000000..c650a954d79af8e08247412563bcb3aa15f310ef
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--
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