The Iris Dataset

Developping Data Products Course Project

Created by Jorge Langa

The Iris dataset

• Introduced by statistician Ronald Fisher

• 3 species of Iris:

  • I. setosa
  • I. virginica
  • I. versicolor

• 4 measurements:

  • Sepal: lenght and width (in cm.)
  • Petal: length and width (in cm.)

Working in R

data(iris) # Load the dataset in case it's not
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 ...

Taking a look into the dataset

pairs(iris[,1:4],col=iris$Species)

Developping a Shiny app

• To do data exploration without knowing R programming!

• Here is the app!

• Choose a species

• Choose what to visualize (petal or sepal)

• Et violà!