1% 1. Title: Iris Plants Database 2% 3% 2. Sources: 4% (a) Creator: R.A. Fisher 5% (b) Donor: Michael Marshall (MARSHALL%PLU@io.arc.nasa.gov) 6% (c) Date: July, 1988 7% 8% 3. Past Usage: 9% - Publications: too many to mention!!! Here are a few. 10% 1. Fisher,R.A. "The use of multiple measurements in taxonomic problems" 11% Annual Eugenics, 7, Part II, 179-188 (1936); also in "Contributions 12% to Mathematical Statistics" (John Wiley, NY, 1950). 13% 2. Duda,R.O., & Hart,P.E. (1973) Pattern Classification and Scene Analysis. 14% (Q327.D83) John Wiley & Sons. ISBN 0-471-22361-1. See page 218. 15% 3. Dasarathy, B.V. (1980) "Nosing Around the Neighborhood: A New System 16% Structure and Classification Rule for Recognition in Partially Exposed 17% Environments". IEEE Transactions on Pattern Analysis and Machine 18% Intelligence, Vol. PAMI-2, No. 1, 67-71. 19% -- Results: 20% -- very low misclassification rates (0% for the setosa class) 21% 4. Gates, G.W. (1972) "The Reduced Nearest Neighbor Rule". IEEE 22% Transactions on Information Theory, May 1972, 431-433. 23% -- Results: 24% -- very low misclassification rates again 25% 5. See also: 1988 MLC Proceedings, 54-64. Cheeseman et al's AUTOCLASS II 26% conceptual clustering system finds 3 classes in the data. 27% 28% 4. Relevant Information: 29% --- This is perhaps the best known database to be found in the pattern 30% recognition literature. Fisher's paper is a classic in the field 31% and is referenced frequently to this day. (See Duda & Hart, for 32% example.) The data set contains 3 classes of 50 instances each, 33% where each class refers to a type of iris plant. One class is 34% linearly separable from the other 2; the latter are NOT linearly 35% separable from each other. 36% --- Predicted attribute: class of iris plant. 37% --- This is an exceedingly simple domain. 38% 39% 5. Number of Instances: 150 (50 in each of three classes) 40% 41% 6. Number of Attributes: 4 numeric, predictive attributes and the class 42% 43% 7. Attribute Information: 44% 1. sepal length in cm 45% 2. sepal width in cm 46% 3. petal length in cm 47% 4. petal width in cm 48% 5. class: 49% -- Iris Setosa 50% -- Iris Versicolour 51% -- Iris Virginica 52% 53% 8. Missing Attribute Values: None 54% 55% Summary Statistics: 56% Min Max Mean SD Class Correlation 57% sepal length: 4.3 7.9 5.84 0.83 0.7826 58% sepal width: 2.0 4.4 3.05 0.43 -0.4194 59% petal length: 1.0 6.9 3.76 1.76 0.9490 (high!) 60% petal width: 0.1 2.5 1.20 0.76 0.9565 (high!) 61% 62% 9. Class Distribution: 33.3% for each of 3 classes. 63 64@RELATION iris 65 66@ATTRIBUTE sepallength REAL 67@ATTRIBUTE sepalwidth REAL 68@ATTRIBUTE petallength REAL 69@ATTRIBUTE petalwidth REAL 70@ATTRIBUTE class {Iris-setosa,Iris-versicolor,Iris-virginica} 71 72@DATA 735.1,3.5,1.4,0.2,Iris-setosa 744.9,3.0,1.4,0.2,Iris-setosa 754.7,3.2,1.3,0.2,Iris-setosa 764.6,3.1,1.5,0.2,Iris-setosa 775.0,3.6,1.4,0.2,Iris-setosa 785.4,3.9,1.7,0.4,Iris-setosa 794.6,3.4,1.4,0.3,Iris-setosa 805.0,3.4,1.5,0.2,Iris-setosa 814.4,2.9,1.4,0.2,Iris-setosa 824.9,3.1,1.5,0.1,Iris-setosa 835.4,3.7,1.5,0.2,Iris-setosa 844.8,3.4,1.6,0.2,Iris-setosa 854.8,3.0,1.4,0.1,Iris-setosa 864.3,3.0,1.1,0.1,Iris-setosa 875.8,4.0,1.2,0.2,Iris-setosa 885.7,4.4,1.5,0.4,Iris-setosa 895.4,3.9,1.3,0.4,Iris-setosa 905.1,3.5,1.4,0.3,Iris-setosa 915.7,3.8,1.7,0.3,Iris-setosa 925.1,3.8,1.5,0.3,Iris-setosa 935.4,3.4,1.7,0.2,Iris-setosa 945.1,3.7,1.5,0.4,Iris-setosa 954.6,3.6,1.0,0.2,Iris-setosa 965.1,3.3,1.7,0.5,Iris-setosa 974.8,3.4,1.9,0.2,Iris-setosa 985.0,3.0,1.6,0.2,Iris-setosa 995.0,3.4,1.6,0.4,Iris-setosa 1005.2,3.5,1.5,0.2,Iris-setosa 1015.2,3.4,1.4,0.2,Iris-setosa 1024.7,3.2,1.6,0.2,Iris-setosa 1034.8,3.1,1.6,0.2,Iris-setosa 1045.4,3.4,1.5,0.4,Iris-setosa 1055.2,4.1,1.5,0.1,Iris-setosa 1065.5,4.2,1.4,0.2,Iris-setosa 1074.9,3.1,1.5,0.1,Iris-setosa 1085.0,3.2,1.2,0.2,Iris-setosa 1095.5,3.5,1.3,0.2,Iris-setosa 1104.9,3.1,1.5,0.1,Iris-setosa 1114.4,3.0,1.3,0.2,Iris-setosa 1125.1,3.4,1.5,0.2,Iris-setosa 1135.0,3.5,1.3,0.3,Iris-setosa 1144.5,2.3,1.3,0.3,Iris-setosa 1154.4,3.2,1.3,0.2,Iris-setosa 1165.0,3.5,1.6,0.6,Iris-setosa 1175.1,3.8,1.9,0.4,Iris-setosa 1184.8,3.0,1.4,0.3,Iris-setosa 1195.1,3.8,1.6,0.2,Iris-setosa 1204.6,3.2,1.4,0.2,Iris-setosa 1215.3,3.7,1.5,0.2,Iris-setosa 1225.0,3.3,1.4,0.2,Iris-setosa 1237.0,3.2,4.7,1.4,Iris-versicolor 1246.4,3.2,4.5,1.5,Iris-versicolor 1256.9,3.1,4.9,1.5,Iris-versicolor 1265.5,2.3,4.0,1.3,Iris-versicolor 1276.5,2.8,4.6,1.5,Iris-versicolor 1285.7,2.8,4.5,1.3,Iris-versicolor 1296.3,3.3,4.7,1.6,Iris-versicolor 1304.9,2.4,3.3,1.0,Iris-versicolor 1316.6,2.9,4.6,1.3,Iris-versicolor 1325.2,2.7,3.9,1.4,Iris-versicolor 1335.0,2.0,3.5,1.0,Iris-versicolor 1345.9,3.0,4.2,1.5,Iris-versicolor 1356.0,2.2,4.0,1.0,Iris-versicolor 1366.1,2.9,4.7,1.4,Iris-versicolor 1375.6,2.9,3.6,1.3,Iris-versicolor 1386.7,3.1,4.4,1.4,Iris-versicolor 1395.6,3.0,4.5,1.5,Iris-versicolor 1405.8,2.7,4.1,1.0,Iris-versicolor 1416.2,2.2,4.5,1.5,Iris-versicolor 1425.6,2.5,3.9,1.1,Iris-versicolor 1435.9,3.2,4.8,1.8,Iris-versicolor 1446.1,2.8,4.0,1.3,Iris-versicolor 1456.3,2.5,4.9,1.5,Iris-versicolor 1466.1,2.8,4.7,1.2,Iris-versicolor 1476.4,2.9,4.3,1.3,Iris-versicolor 1486.6,3.0,4.4,1.4,Iris-versicolor 1496.8,2.8,4.8,1.4,Iris-versicolor 1506.7,3.0,5.0,1.7,Iris-versicolor 1516.0,2.9,4.5,1.5,Iris-versicolor 1525.7,2.6,3.5,1.0,Iris-versicolor 1535.5,2.4,3.8,1.1,Iris-versicolor 1545.5,2.4,3.7,1.0,Iris-versicolor 1555.8,2.7,3.9,1.2,Iris-versicolor 1566.0,2.7,5.1,1.6,Iris-versicolor 1575.4,3.0,4.5,1.5,Iris-versicolor 1586.0,3.4,4.5,1.6,Iris-versicolor 1596.7,3.1,4.7,1.5,Iris-versicolor 1606.3,2.3,4.4,1.3,Iris-versicolor 1615.6,3.0,4.1,1.3,Iris-versicolor 1625.5,2.5,4.0,1.3,Iris-versicolor 1635.5,2.6,4.4,1.2,Iris-versicolor 1646.1,3.0,4.6,1.4,Iris-versicolor 1655.8,2.6,4.0,1.2,Iris-versicolor 1665.0,2.3,3.3,1.0,Iris-versicolor 1675.6,2.7,4.2,1.3,Iris-versicolor 1685.7,3.0,4.2,1.2,Iris-versicolor 1695.7,2.9,4.2,1.3,Iris-versicolor 1706.2,2.9,4.3,1.3,Iris-versicolor 1715.1,2.5,3.0,1.1,Iris-versicolor 1725.7,2.8,4.1,1.3,Iris-versicolor 1736.3,3.3,6.0,2.5,Iris-virginica 1745.8,2.7,5.1,1.9,Iris-virginica 1757.1,3.0,5.9,2.1,Iris-virginica 1766.3,2.9,5.6,1.8,Iris-virginica 1776.5,3.0,5.8,2.2,Iris-virginica 1787.6,3.0,6.6,2.1,Iris-virginica 1794.9,2.5,4.5,1.7,Iris-virginica 1807.3,2.9,6.3,1.8,Iris-virginica 1816.7,2.5,5.8,1.8,Iris-virginica 1827.2,3.6,6.1,2.5,Iris-virginica 1836.5,3.2,5.1,2.0,Iris-virginica 1846.4,2.7,5.3,1.9,Iris-virginica 1856.8,3.0,5.5,2.1,Iris-virginica 1865.7,2.5,5.0,2.0,Iris-virginica 1875.8,2.8,5.1,2.4,Iris-virginica 1886.4,3.2,5.3,2.3,Iris-virginica 1896.5,3.0,5.5,1.8,Iris-virginica 1907.7,3.8,6.7,2.2,Iris-virginica 1917.7,2.6,6.9,2.3,Iris-virginica 1926.0,2.2,5.0,1.5,Iris-virginica 1936.9,3.2,5.7,2.3,Iris-virginica 1945.6,2.8,4.9,2.0,Iris-virginica 1957.7,2.8,6.7,2.0,Iris-virginica 1966.3,2.7,4.9,1.8,Iris-virginica 1976.7,3.3,5.7,2.1,Iris-virginica 1987.2,3.2,6.0,1.8,Iris-virginica 1996.2,2.8,4.8,1.8,Iris-virginica 2006.1,3.0,4.9,1.8,Iris-virginica 2016.4,2.8,5.6,2.1,Iris-virginica 2027.2,3.0,5.8,1.6,Iris-virginica 2037.4,2.8,6.1,1.9,Iris-virginica 2047.9,3.8,6.4,2.0,Iris-virginica 2056.4,2.8,5.6,2.2,Iris-virginica 2066.3,2.8,5.1,1.5,Iris-virginica 2076.1,2.6,5.6,1.4,Iris-virginica 2087.7,3.0,6.1,2.3,Iris-virginica 2096.3,3.4,5.6,2.4,Iris-virginica 2106.4,3.1,5.5,1.8,Iris-virginica 2116.0,3.0,4.8,1.8,Iris-virginica 2126.9,3.1,5.4,2.1,Iris-virginica 2136.7,3.1,5.6,2.4,Iris-virginica 2146.9,3.1,5.1,2.3,Iris-virginica 2155.8,2.7,5.1,1.9,Iris-virginica 2166.8,3.2,5.9,2.3,Iris-virginica 2176.7,3.3,5.7,2.5,Iris-virginica 2186.7,3.0,5.2,2.3,Iris-virginica 2196.3,2.5,5.0,1.9,Iris-virginica 2206.5,3.0,5.2,2.0,Iris-virginica 2216.2,3.4,5.4,2.3,Iris-virginica 2225.9,3.0,5.1,1.8,Iris-virginica 223% 224% 225% 226