HDF  a`  TREEHEAPX datadata_descr8 (nameiris (mldata0 P comment. 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.8TREEHEAPXXdouble0class@SNOD  ( ?@4 4P~LxSNOD'ffffff@@@ffffff@@@ffffff@@@@@333333@333333@333333@333333@@@ffffff@@ffffff@@ffffff@ffffff@ffffff@333333@@@@@@333333@@@@@@@@@ffffff@@@@@ffffff@333333@ffffff@ffffff@333333@@@@@@@@333333@@ffffff@@@@@ffffff@ffffff@@ffffff@333333@@ffffff@@ffffff@333333@ffffff@@ffffff@333333@@@@@@333333@@@@@333333@ffffff@@@ffffff@333333@@ffffff@@@@ffffff@@333333@333333@ffffff@333333@@ffffff@@333333@@@@@333333@@333333@@@@@@@ffffff@@333333@@@@ffffff@@@@@@333333@ffffff@@333333@@@@@@333333@333333@@@333333@@@@ @@ @@ @333333@333333 @333333 @333333@@ @333333 @@@@@333333@ @ffffff@ffffff@333333 @ @ @ffffff @333333 @@333333 @ @333333 @ @@333333 @ffffff@@@ @ @@@333333 @ @ffffff@ @ @ffffff@@ffffff@ @ @ffffff @ @ @@ffffff@ffffff@ffffff@ffffff @333333@333333@@@@@333333@333333@@@@@@ @ffffff@@ffffff@333333@@ffffff@@333333@@333333@333333@@@@333333 @@ffffff@@@@@@ffffff@@@333333@333333@@ffffff@ffffff @@@333333@@@@333333@@ @ @@@@ffffff@ @@ffffff@@@ @ffffff@ffffff@@ffffff @ @ffffff@@ffffff@@ffffff@ffffff@ffffff@ffffff@@@333333 @@@@@@@ @ffffff @@@@333333 @@ffffff?ffffff???ffffff?333333?ffffff??ffffff????ffffff??333333???ffffff?333333??333333???333333?ffffff????ffffff?????ffffff??333333?????????ffffff?ffffff??ffffff??ffffff?@@@@ffffff@@@ffffff @ffffff@333333@ @@@@ @@@ffffff@@333333@333333@@@@333333@@333333@@@ @ffffff@ @333333@ffffff@@@@@ffffff@@@ffffff@@ffffff @@@@333333@@ffffff@@ffffff@@ffffff@333333@ffffff@@333333@333333@ffffff@ffffff@333333@@@ffffff@333333@@@@@@@@@@@333333@@ffffff@333333@ffffff@@ffffff@ffffff@ffffff@ffffff@ffffff@@333333@@ffffff@ffffff@ffffff@@@@@@@ffffff@??????333333???????????333333?333333?333333?????????????????????333333?333333??333333??333333?????ffffff?????????ffffff????ffffff??ffffff????????333333??ffffff?ffffff?333333?????333333????????333333?ffffff?333333???333333?????@ffffff?@?@@333333???@@ffffff?@@333333@ffffff@?@ffffff@?ffffff@@@?@???@?ffffff?@@?ffffff?ffffff@333333@??@333333@ffffff@ffffff?ffffff@@ffffff@ffffff?@ffffff@?/` ~LH(h*TREE+ HEAPX(*namesorderingtypes0pXP~LSNOD*8- p`X ~Lp8p8p8p82p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8 p8q p8r p8s p8t p8u p8v p8w p8x p8y p8z p8{ p8| p8} p8~ p8 p8 p8 p8 p8 p8L p8M p8N p8O p8P p8Q p8R p8S p8T p8U p8V p8Wp8Xp8Yp8Zp8[p8\p8]p8^p8_p8`p8ap8bp8cp8dp8ep8fp8gp8hp8ip8jp8kp8lp8mp8np8op8pp8p8p8p8p8p8p8p8p8 p8 p8 p8 p8 p8p8p8p8p8p8p8p8p8p8p8p8p8p8p8p8p8p8p8 p8!p8"p8#p8$p8%p8&p8'p8(p8)p8*p8+p8,p8-p8.p8/p80p81p82p83p84p85p86p87p88p89p8:p8;p8<p8=p8>p8?p8@p8Ap8Bp8Cp8Dp8Ep8Fp8Gp8Hp8Ip8Jp8KGCOL Iris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolor Iris-versicolor Iris-versicolor Iris-versicolor Iris-versicolor Iris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-versicolorIris-virginicaIris-virginicaIris-virginicaIris-virginicaIris-virginicaIris-virginica Iris-virginica!Iris-virginica"Iris-virginica#Iris-virginica$Iris-virginica%Iris-virginica&Iris-virginica'Iris-virginica(Iris-virginica)Iris-virginica*Iris-virginica+Iris-virginica,Iris-virginica-Iris-virginica.Iris-virginica/Iris-virginica0Iris-virginica1Iris-virginica2Iris-virginica3Iris-virginica4Iris-virginica5Iris-virginica6Iris-virginica7Iris-virginica8Iris-virginica9Iris-virginica:Iris-virginica;Iris-virginica<Iris-virginica=Iris-virginica>Iris-virginica?Iris-virginica@Iris-virginicaAIris-virginicaBIris-virginicaCIris-virginicaDIris-virginicaEIris-virginicaFIris-virginicaGIris-virginicaHIris-virginicaIIris-virginicaJIris-virginicaKIris-virginicaL Iris-setosaM Iris-setosaN Iris-setosaO Iris-setosaP Iris-setosaQ Iris-setosaR Iris-setosaS Iris-setosaT Iris-setosaU Iris-setosaV Iris-setosaW Iris-setosaXIris-versicolorYIris-versicolorZIris-versicolor[Iris-versicolor\Iris-versicolor]Iris-versicolor^Iris-versicolor_Iris-versicolor`Iris-versicoloraIris-versicolorbIris-versicolorcIris-versicolordIris-versicoloreIris-versicolorfIris-versicolorgIris-versicolorhIris-versicoloriIris-versicolorjIris-versicolorkIris-versicolorlIris-versicolormIris-versicolornIris-versicoloroIris-versicolorpIris-versicolorq Iris-setosar Iris-setosas Iris-setosat Iris-setosau Iris-setosav Iris-setosaw Iris-setosax Iris-setosay Iris-setosaz Iris-setosa{ Iris-setosa| Iris-setosa} Iris-setosa~ Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa Iris-setosa petalwidthclass petallength sepalwidth sepallengthclassdouble0numeric2nominal:Iris-setosa,Iris-versicolor,Iris-virginicanumericnumericnumeric p8 p8 p8 p8p8p8p8H.P~L