37 lines
1.5 KiB
Plaintext
37 lines
1.5 KiB
Plaintext
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R version 2.5.0 Under development (unstable) (2007-03-25 r40887)
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Copyright (C) 2007 The R Foundation for Statistical Computing
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ISBN 3-900051-07-0
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R is free software and comes with ABSOLUTELY NO WARRANTY.
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You are welcome to redistribute it under certain conditions.
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Type 'license()' or 'licence()' for distribution details.
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R is a collaborative project with many contributors.
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Type 'contributors()' for more information and
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'citation()' on how to cite R or R packages in publications.
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Type 'demo()' for some demos, 'help()' for on-line help, or
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'help.start()' for an HTML browser interface to help.
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Type 'q()' to quit R.
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> library("foreign")
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> df <- read.arff("contact-lenses.arff")
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> summary(df)
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age spectacle-prescrip astigmatism tear-prod-rate
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pre-presbyopic:8 hypermetrope:12 no :12 normal :12
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presbyopic :8 myope :12 yes:12 reduced:12
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young :8
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contact-lenses
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hard: 4
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none:15
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soft: 5
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> str(df)
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'data.frame': 24 obs. of 5 variables:
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$ age : Factor w/ 3 levels "pre-presbyopic",..: 3 3 3 3 3 3 3 3 1 1 ...
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$ spectacle-prescrip: Factor w/ 2 levels "hypermetrope",..: 2 2 2 2 1 1 1 1 2 2 ...
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$ astigmatism : Factor w/ 2 levels "no","yes": 1 1 2 2 1 1 2 2 1 1 ...
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$ tear-prod-rate : Factor w/ 2 levels "normal","reduced": 2 1 2 1 2 1 2 1 2 1 ...
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$ contact-lenses : Factor w/ 3 levels "hard","none",..: 2 3 2 1 2 3 2 1 2 3 ...
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> q()
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