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- 1. Title: Iris Plants Database
-
- 2. Sources:
- (a) Creator: R.A. Fisher
- (b) Donor: Michael Marshall (MARSHALL%PLU@io.arc.nasa.gov)
- (c) Date: July, 1988
-
- 3. Past Usage:
- - Publications: too many to mention!!! Here are a few.
- 1. Fisher,R.A. "The use of multiple measurements in taxonomic problems"
- Annual Eugenics, 7, Part II, 179-188 (1936); also in "Contributions
- to Mathematical Statistics" (John Wiley, NY, 1950).
- 2. Duda,R.O., & Hart,P.E. (1973) Pattern Classification and Scene Analysis.
- (Q327.D83) John Wiley & Sons. ISBN 0-471-22361-1. See page 218.
- 3. Dasarathy, B.V. (1980) "Nosing Around the Neighborhood: A New System
- Structure and Classification Rule for Recognition in Partially Exposed
- Environments". IEEE Transactions on Pattern Analysis and Machine
- Intelligence, Vol. PAMI-2, No. 1, 67-71.
- -- Results:
- -- very low misclassification rates (0% for the setosa class)
- 4. Gates, G.W. (1972) "The Reduced Nearest Neighbor Rule". IEEE
- Transactions on Information Theory, May 1972, 431-433.
- -- Results:
- -- very low misclassification rates again
- 5. See also: 1988 MLC Proceedings, 54-64. Cheeseman et al's AUTOCLASS II
- conceptual clustering system finds 3 classes in the data.
-
- 4. Relevant Information:
- --- This is perhaps the best known database to be found in the pattern
- recognition literature. Fisher's paper is a classic in the field
- and is referenced frequently to this day. (See Duda & Hart, for
- example.) 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.
-
- 5. Number of Instances: 150 (50 in each of three classes)
-
- 6. Number of Attributes: 4 numeric, predictive attributes and the class
-
- 7. Attribute Information:
- 1. sepal length in cm
- 2. sepal width in cm
- 3. petal length in cm
- 4. petal width in cm
- 5. class:
- -- Iris Setosa
- -- Iris Versicolour
- -- Iris Virginica
-
- 8. Missing Attribute Values: None
-
- Summary Statistics:
- Min Max Mean SD Class Correlation
- sepal length: 4.3 7.9 5.84 0.83 0.7826
- sepal width: 2.0 4.4 3.05 0.43 -0.4194
- petal length: 1.0 6.9 3.76 1.76 0.9490 (high!)
- petal width: 0.1 2.5 1.20 0.76 0.9565 (high!)
-
- 9. Class Distribution: 33.3% for each of 3 classes.
-