an ordered factor specifying the storage treatment - 1 (0
days), 2 (1 day), 3 (2 days), 4 (4 days), 5 (9 days), and 6
(18 days)
score
a numeric vector giving the tenderness score of beef roast.
Block
an ordered factor identifying the muscle from which the
roast was extracted with levels
II < V < I < III < IV
Pair
an ordered factor giving the unique identifier for each pair
of beef roasts with levels II-1 < ... < IV-1
Details
Cochran and Cox (section 11.51, 1957) describe data from an
experiment conducted at Iowa State College (Paul, 1943) to
compare the effects of length of cold storage on the tenderness of
beef roasts. Six storage periods ranging from 0 to 18 days were used.
Thirty roasts were scored by four judges on a scale from 0 to 10, with
the score increasing with tenderness. The response was the sum of all
four scores. Left and right roasts from the same animal were grouped
into pairs, which were further grouped into five blocks, according to
the muscle from which they were extracted. Different storage periods
were applied to each roast within a pair according to a balanced
incomplete block design.
Source
Cochran, W. G. and Cox, G. M. (1957), Experimental Designs,
Wiley, New York.
Examples
str(Meat)
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)
R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.
R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.
Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.
> library(MEMSS)
Loading required package: lme4
Loading required package: Matrix
Attaching package: 'MEMSS'
The following objects are masked from 'package:datasets':
CO2, Orange, Theoph
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/MEMSS/Meat.Rd_%03d_medium.png", width=480, height=480)
> ### Name: Meat
> ### Title: Tenderness of meat
> ### Aliases: Meat
> ### Keywords: datasets
>
> ### ** Examples
>
> str(Meat)
'data.frame': 30 obs. of 4 variables:
$ Storage: Factor w/ 6 levels " 0"," 1"," 2",..: 1 2 3 4 5 6 1 3 2 5 ...
$ score : num 7 17 26 25 33 29 17 27 23 27 ...
$ Block : Factor w/ 5 levels "I","II","III",..: 1 1 1 1 1 1 2 2 2 2 ...
$ Pair : Factor w/ 15 levels "I-1","I-2","I-3",..: 1 1 2 2 3 3 4 4 5 5 ...
>
>
>
>
>
> dev.off()
null device
1
>