R for Business Analytics by A. Ohri

Author:A. Ohri
Language: eng
Format: epub
Publisher: Springer New York, New York, NY

5.4.1.1 Histograms

Histograms are commonly used to show the distribution of data for variables and for probability estimation. Creating a histogram in R is as simple as typing hist(dataset$variable):

¿ data(iris)

¿ hist(iris)

Error in hist.default(iris) : ‘x’ must be numeric

¿ names(iris) [1] ”Sepal.Length” ”Sepal.Width” ”Petal.Length” ”Petal.Width” ”Species”

¿ str(iris) ’data.frame’: 150 obs. of 5 variables:

$ Sepal.Length: num 5.1 4.9 4.7 4.6 5 5.4 4.6 5 4.4 4.9...

$ Sepal.Width : num 3.5 3 3.2 3.1 3.6 3.9 3.4 3.4 2.9 3.1...

$ Petal.Length: num 1.4 1.4 1.3 1.5 1.4 1.7 1.4 1.5 1.4 1.5...

$ Petal.Width : num 0.2 0.2 0.2 0.2 0.2 0.4 0.3 0.2 0.2 0.1...

$ Species : Factor w/ 3 levels ”setosa”,”versicolor”,..: 1 1 1 1 1 1 1 1 1 1...

¿ hist(iris$Sepal.Length)

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