|1. Title: Large Soybean Database
|
|2. Sources:
|     (a) R.S. Michalski and R.L. Chilausky "Learning by Being Told and
|         Learning from Examples: An Experimental Comparison of the Two
|	 Methods of Knowledge Acquisition in the Context of Developing
|	 an Expert System for Soybean Disease Diagnosis", International
|	 Journal of Policy Analysis and Information Systems, Vol. 4,
|	 No. 2, 1980.
|     (b) Donor: Ming Tan & Jeff Schlimmer (Jeff.Schlimmer%cs.cmu.edu)
|     (c) Date: 11 July 1988
|
|3. Past Usage:
|      1. See above.
|      2. Tan, M., & Eshelman, L. (1988). Using weighted networks to represent
|         classification knowledge in noisy domains.  Proceedings of the Fifth
|         International Conference on Machine Learning (pp. 121-134). Ann Arbor,
|         Michigan: Morgan Kaufmann.
|         -- IWN recorded a 97.1% classification accuracy 
|            -- 290 training and 340 test instances
|      3. Fisher,D.H. & Schlimmer,J.C. (1988). Concept Simplification and
|         Predictive Accuracy. Proceedings of the Fifth
|         International Conference on Machine Learning (pp. 22-28). Ann Arbor,
|         Michigan: Morgan Kaufmann.
|         -- Notes why this database is highly predictable
|
|4. Relevant Information Paragraph:
|    There are 19 classes, only the first 15 of which have been used in prior
|    work.  The folklore seems to be that the last four classes are
|    unjustified by the data since they have so few examples.
|    There are 35 categorical attributes, some nominal and some ordered.  The
|    value ``dna'' means does not apply.  The values for attributes are
|    encoded numerically, with the first value encoded as ``0,'' the second as
|    ``1,'' and so forth.  An unknown values is encoded as ``?''.
|
|5. Number of Instances: 307
|
|6. Number of Attributes: 35 (all have been nominalized)
| 
|7. Attribute Information: 
|    -- 19 Classes
|     diaporthe-stem-canker, charcoal-rot, rhizoctonia-root-rot,
|     phytophthora-rot, brown-stem-rot, powdery-mildew,
|     downy-mildew, brown-spot, bacterial-blight,
|     bacterial-pustule, purple-seed-stain, anthracnose,
|     phyllosticta-leaf-spot, alternarialeaf-spot,
|     frog-eye-leaf-spot, diaporthe-pod-&-stem-blight,
|     cyst-nematode, 2-4-d-injury, herbicide-injury.	
|
|    1. date:		april,may,june,july,august,september,october,?.
|    2. plant-stand:	normal,lt-normal,?.
|    3. precip:		lt-norm,norm,gt-norm,?.
|    4. temp:		lt-norm,norm,gt-norm,?.
|    5. hail:		yes,no,?.
|    6. crop-hist:	diff-lst-year,same-lst-yr,same-lst-two-yrs,
|                        same-lst-sev-yrs,?.
|    7. area-damaged:	scattered,low-areas,upper-areas,whole-field,?.
|    8. severity:	minor,pot-severe,severe,?.
|    9. seed-tmt:	none,fungicide,other,?.
|   10. germination:	90-100%,80-89%,lt-80%,?.
|   11. plant-growth:	norm,abnorm,?.
|   12. leaves:		norm,abnorm.
|   13. leafspots-halo:	absent,yellow-halos,no-yellow-halos,?.
|   14. leafspots-marg:	w-s-marg,no-w-s-marg,dna,?.
|   15. leafspot-size:	lt-1/8,gt-1/8,dna,?.
|   16. leaf-shread:	absent,present,?.
|   17. leaf-malf:	absent,present,?.
|   18. leaf-mild:	absent,upper-surf,lower-surf,?.
|   19. stem:		norm,abnorm,?.
|   20. lodging:    	yes,no,?.
|   21. stem-cankers:	absent,below-soil,above-soil,above-sec-nde,?.
|   22. canker-lesion:	dna,brown,dk-brown-blk,tan,?.
|   23. fruiting-bodies:	absent,present,?.
|   24. external decay:	absent,firm-and-dry,watery,?.
|   25. mycelium:	absent,present,?.
|   26. int-discolor:	none,brown,black,?.
|   27. sclerotia:	absent,present,?.
|   28. fruit-pods:	norm,diseased,few-present,dna,?.
|   29. fruit spots:	absent,colored,brown-w/blk-specks,distort,dna,?.
|   30. seed:		norm,abnorm,?.
|   31. mold-growth:	absent,present,?.
|   32. seed-discolor:	absent,present,?.
|   33. seed-size:	norm,lt-norm,?.
|   34. shriveling:	absent,present,?.
|   35. roots:		norm,rotted,galls-cysts,?.
|
|8. Number of Missing Attribute Values: (denoted by "?")
|   (Problem: these don't appear to be correct!  Needs to be updated.)
|    1. date: 0
|    2. plant-stand: 1
|    3. precip: 8
|    4. temp: 11
|    5. hail: 7
|    6. crop-hist: 41
|    7. area-damaged: 1
|    8. severity: 1
|    9. seed-tmt: 41
|   10. germination: 41
|   11. plant-growth: 36
|   12. leaves: 1
|   13. leafspots-halo: 0
|   14. leafspots-marg: 25
|   15. leafspot-size: 25
|   16. leaf-shread: 25
|   17. leaf-malf: 26
|   18. leaf-mild: 25
|   19. stem: 30
|   20. lodging: 1
|   21. stem-cankers: 41
|   22. canker-lesion: 11
|   23. fruiting-bodies: 11
|   24. external decay: 35
|   25. mycelium: 11
|   26. int-discolor: 11
|   27. sclerotia: 11
|   28. fruit-pods: 11
|   29. fruit spots: 25
|   30. seed: 35
|   31. mold-growth: 29
|   32. seed-discolor: 29
|   33. seed-size: 35
|   34. shriveling: 29
|   35. roots: 35
|
|9. Class Distribution: 
|   1. diaporthe-stem-canker: 10
|   2. charcoal-rot: 10
|   3. rhizoctonia-root-rot: 10
|   4. phytophthora-rot: 40
|   5. brown-stem-rot: 20
|   6. powdery-mildew: 10
|   7. downy-mildew: 10
|   8. brown-spot: 40
|   9. bacterial-blight: 10
|  10. bacterial-pustule: 10
|  11. purple-seed-stain: 10
|  12. anthracnose: 20
|  13. phyllosticta-leaf-spot: 10
|  14. alternarialeaf-spot: 40
|  15. frog-eye-leaf-spot: 40
|  16. diaporthe-pod-&-stem-blight: 6
|  17. cyst-nematode: 6
|  18. 2-4-d-injury: 1
|  19. herbicide-injury: 4

     diaporthe-stem-canker, charcoal-rot, rhizoctonia-root-rot,
     phytophthora-rot, brown-stem-rot, powdery-mildew,
     downy-mildew, brown-spot, bacterial-blight,
     bacterial-pustule, purple-seed-stain, anthracnose,
     phyllosticta-leaf-spot, alternarialeaf-spot,
     frog-eye-leaf-spot, diaporthe-pod-&-stem-blight,
     cyst-nematode, 2-4-d-injury, herbicide-injury.	

date:		0,1,2,3,4,5,6.
plant-stand:	0,1.
precip:		0,1,2.
temp:		0,1,2.
hail:		0,1.
crop-hist:	0,1,2,3.
area-damaged:	0,1,2,3.
severity:	0,1,2.
seed-tmt:	0,1,2.
germination:	0,1,2.
plant-growth:	0,1.
leaves:		0,1.
leafspots-halo:	0,1,2.
leafspots-marg:	0,1,2.
leafspot-size:	0,1,2.
leaf-shread:	0,1.
leaf-malf:	0,1.
leaf-mild:	0,1,2.
stem:		0,1.
lodging:    	0,1.
stem-cankers:	0,1,2,3.
canker-lesion:	0,1,2,3.
fruiting-bodies:0,1.
external decay:	0,1,2.
mycelium:	0,1.
int-discolor:	0,1,2.
sclerotia:	0,1.
fruit-pods:	0,1,2,3.
fruit spots:	0,1,2,3,4.
seed:		0,1.
mold-growth:	0,1.
seed-discolor:	0,1.
seed-size:	0,1.
shriveling:	0,1.
roots:		0,1,2.