2011-07-11 08:54:45 +00:00
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library(MASS)
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painters
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painters$School
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school = painters$School
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school.freq = table(school)
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school.freq
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cbind(school.freq)
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head(painters)
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composition = painters$Composition
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composition.freq = table(composition)
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cbind(composition.freq)
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school
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school.freq
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school.freq[1]
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help(max)
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school[,][1]
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school[1,][1]
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school[1][1]
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school[1]
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school.freq[1,]
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school.freq[1]
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school.freq[1][1]
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school.freq[1]
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help(typeof)
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typeof(school.freq[1])
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max(school.freq)
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max(school)
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max(school.freq)
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school.relfreq = school.freq / nrow(painters)
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school.relfreq
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settings = options(digits=1)
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school.relfreq
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options(settings)
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cbind(school.relfreq)
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composition.freq
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composition.relfreq = composition.freq / nrow(composition)
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composition.relfreq = composition.freq / nrow(painters)
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composition.relfreq
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cbind(composition.relfreq)
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# bar graph exercise
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library(MASS)
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school = painters$School
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school.freq = table(school)
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barplot(school.freq)
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colors = c("red", "yellow", "green", "violet", "orange", "blue", "pink", "cyan")
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barplot(schools.freq, col=colors)
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barplot(school.freq, col=colors)
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composition = painters$Composition
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composition.freq = table(composition)
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count.fields(composition.freq)
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ncol(composition.freq)
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composition.freq
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nrow(composition.freq)
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nrow(school.freq)
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colors
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barplot(composition.freq, col=colors)
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q()
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2011-07-11 09:35:43 +00:00
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library(MASS)
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school = painters$school
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school
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school = painters$School
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school
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school.freq = table(school)
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pip(school.freq)
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pie(school.freq)
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colors = c("red", "yellow", "green", "violet", "orange", "blue", "pink", "cyan")
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pie(school.freq, col=colors)
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composition = painters$Composition
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composition.freq = table(composition)
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pip(composition.freq, col=colors)
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pie(composition.freq, col=colors)
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library(MASS)
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school = painters$School
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c_school = school == "C"
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c_painters = painters[c_school,]
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mean(c_painters$Composition)
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pie(tapply(painters$Composition, painters$School, mean)
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pie(tapply(painters$Composition, painters$School, mean))
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barchart(tapply(painters$Composition, painters$School, mean))
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barplot(tapply(painters$Composition, painters$School, mean))
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q()
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