electrode {Flury} | R Documentation |
Comparison of eletrode measurements from two machines
data(electrode)
A data frame with 100 observations, 50 from each machine, on the following 5 variables.
Machine
1
2
X1
X2
X3
X4
X5
See Figure 5.3.3 in Flury 1997, or the orginal figure 7.20 in Flury and Riedwyl for a better explaination of the five measurements. The actual data presented are linear transformations of the original variables (for reasons of commercial confidentiality).
Flury, B. and H. Riedwyl (1988) Multivariate Statistics: A practical approach. London: Chapman and Hall
Flury, B.D. (1997) A First Course in Multivariate Statistics New York: Springer
data(electrode) ## Not run: pairs(apply(electrode[,-1], 2, jitter, 2), lower.panel = function(x, y){ points(x, y, pch = unclass(electrode[,1]), col = as.numeric(electrode[,1]))}, main = "Pairwise scatter plots for Electrode data") ## End(Not run)