Iris

About
A small classic dataset from Fisher, 1936. One of the earliest known datasets used for evaluating classification methods.
This is one of the earliest datasets used in the literature on classification methods and widely used in statistics and machine learning. The data set contains 3 classes of 50 instances each, where each class refers to a type of iris plant. One class is linearly separable from the other 2; the latter are not linearly separable from each other.
Predicted attribute: class of iris plant.
This is an exceedingly simple domain.
This data differs from the data presented in Fishers article (identified by Steve Chadwick, spchadwick@espeedaz.net ). The 35th sample should be: 4.9,3.1,1.5,0.2,"Iris-setosa" where the error is in the fourth feature. The 38th sample: 4.9,3.6,1.4,0.1,"Iris-setosa" where the errors are in the second and third features.
Subject Area
Biology
Instances
150
Features
4
Data Types
Tabular
Tasks
Classification
Feature Types
Continuous
Features
Name | Role | Type | Units | Missing Values | Description |
---|---|---|---|---|---|
sepal length | Feature | Continuous | cm | No | |
sepal width | Feature | Continuous | cm | No | |
petal length | Feature | Continuous | cm | No | |
petal width | Feature | Continuous | cm | No | |
class | Target | Categorical | - | No |
Introductory Paper
The Iris data set: In search of the source of virginica
A. Unwin, K. Kleinman. 2021.
Significance, 2021