```{r} boxplots <- function(dataframe){ #creates a box plot of all provided data broken down by column name
par(mar=c(7,5,1,1))
boxplot(dataframe)
}
boxplots(dataframe)

boxplotspec <- function(dataframe){ #creates a box plot for each species
dfsub1 <- subset(dataframe, Species == "versicolor")
dfsub2 <- subset(dataframe, Species == "setosa")
dfsub3 <- subset(dataframe, Species == "virginica")
par(mfrow=c(1,3),mar=c(6,3,2,1))
boxplot(dfsub1[,1:4], main="Versicolor",ylim = c(0,8),las=2)
boxplot(dfsub2[,1:4], main="Setosa",ylim = c(0,8),las=2)
boxplot(dfsub3[,1:4], main="Virginica",ylim = c(0,8),las=2)
}
boxplotspec(dataframe)

histplot <- function(dataframe){ #creates a histogram of all species using the data provided
hist(dataframe$Petal. Length)#to change the data in the plots, replace "Petal. Length" with the desired data column name
par(mfrow=c(1,3))
}
histplot(dataframe)

histplotsspec <- function(dataframe){ #creates histograms of each species.
dfsub1 <- subset(dataframe, Species == "versicolor")
dfsub2 <- subset(dataframe, Species == "setosa")
dfsub3 <- subset(dataframe, Species == "virginica")
hist1 <- hist(dfsub1$Petal. Length, breaks=seq(0,8,l=17),xlim=c(0,8),yl im=c(0,40))
hist2 <- hist(dfsub2$Petal. Length, breaks=seq(0,8,l=17),xlim=c(0,8),yl im=c(0,40))
hist3 <- hist(dfsub3$Petal. Length, breaks=seq(0,8,l=17),xlim=c(0,8),yl im=c(0,40))
#to change the data in the plots, replace "Petal. Length" with the desired data column name
}
histplotsspec(dataframe)

treeunprun <- function(dataframe){ #creates an unpruned decision tree from the data
input <- dataframe[,1:4]
output <- dataframe[,5]
model1 <- C5.0(input, output, control = C5.0Control(noGlobalPruning = TRUE, minCases=1))
plot(model1, main="C5.0 Decision Tree - Unpruned, min=1")
}
treeunprun(dataframe)

treeprun <- function(dataframe){ #creates a pruned decision tree from the data
input <- dataframe[,1:4]
output <- dataframe[,5]
model2 <- C5.0(input, output, control = C5.0Control(noGlobalPruning = FALSE))
plot(model2, main="C5.0 Decision Tree - Pruned")
}
treeprun(dataframe)
```
Quitting from lines 45-94 (6,2-FunctionsRMARKDOWN. Rmd)
Error in eval(parse(text = paste(obj$call)[xspot])) :
object 'input' not found
Calls: ... as. party -> as. party. C5.0 -> data. frame -> eval -> eval

Execution halted