Make Frequency Histogram for Factor Variables
I am very new to R, so I apologize for such a basic question. I spent an hour googling this issue, but couldn't find a solution.
Say I have some categorical data in my data set about common pet types. I input it as a character vector in R that contains the names of different types of animals. I created it like this:
animals <- c("cat", "dog", "dog", "dog", "dog", "dog", "dog", "dog", "cat", "cat", "bird")
I turn it into a factor for use with other vectors in my data frame:
animalFactor <- as.factor(animals)
I now want to create a histogram that shows the frequency of each variable on the y-axis, the name of each factor on the x-axis, and contains one bar for each factor. I attempt this code:
hist(table(animalFactor), freq=TRUE, xlab = levels(animalFactor), ylab = "Frequencies")
The output is absolutely nothing like I'd expect. Labeling problems aside, I can't seem to figure out how to create a simple frequency histogram by category.
Answer
It seems like you want barplot(prop.table(table(animals))):
However, this is not a histogram.