Mushrooms dataset
The information is a replica of the notes for the mushroom dataset from the
UCI repository of machine learning databases.
1. Title: Mushrooms Database
2. Sources:
-
Mushroom records drawn from The Audubon Society Field Guide to North
American Mushrooms (1981). G. H. Lincoff (Pres.), New York: Alfred
A. Knopf
-
Donor: Jeff Schlimmer (Jeffrey.Schlimmer@a.gp.cs.cmu.edu)
-
Date: 27 April 1987
3. Past Usage:
-
Schlimmer,J.S. (1987). Concept Acquisition Through Representational
Adjustment (Technical Report 87-19). Doctoral disseration, Department
of Information and Computer Science, University of California, Irvine.
--- STAGGER: asymptoted to 95% classification accuracy after reviewing
1000 instances.
- Iba,W., Wogulis,J., & Langley,P. (1988). Trading off Simplicity
and Coverage in Incremental Concept Learning. In Proceedings of
the 5th International Conference on Machine Learning, 73-79.
Ann Arbor, Michigan: Morgan Kaufmann.
-- approximately the same results with their HILLARY algorithm
4. Relevant Information:
This data set includes descriptions of hypothetical samples
corresponding to 23 species of gilled mushrooms in the Agaricus and
Lepiota Family (pp. 500-525). Each species is identified as
definitely edible, definitely poisonous, or of unknown edibility and
not recommended. This latter class was combined with the poisonous
one. The Guide clearly states that there is no simple rule for
determining the edibility of a mushroom; no rule like ``leaflets
three, let it be'' for Poisonous Oak and Ivy.
5. Number of Instances: 8124
6. Number of Attributes: 22 (all nominally valued)
7. Attribute Information: (classes: edible=e, poisonous=p)
- cap-shape: bell=b,conical=c,convex=x,flat=f,
knobbed=k,sunken=s
- cap-surface: fibrous=f,grooves=g,scaly=y,smooth=s
- cap-color: brown=n,buff=b,cinnamon=c,gray=g,green=r,
pink=p,purple=u,red=e,white=w,yellow=y
- bruises?: bruises=t,no=f
- 5. odor: almond=a,anise=l,creosote=c,fishy=y,foul=f,
musty=m,none=n,pungent=p,spicy=s
- gill-attachment: attached=a,descending=d,free=f,notched=n
- gill-spacing: close=c,crowded=w,distant=d
- gill-size: broad=b,narrow=n
- gill-color: black=k,brown=n,buff=b,chocolate=h,gray=g,
green=r,orange=o,pink=p,purple=u,red=e,
white=w,yellow=y
- stalk-shape: enlarging=e,tapering=t
- stalk-root: bulbous=b,club=c,cup=u,equal=e,
rhizomorphs=z,rooted=r,missing=?
- stalk-surface-above-ring: ibrous=f,scaly=y,silky=k,smooth=s
- stalk-surface-below-ring: ibrous=f,scaly=y,silky=k,smooth=s
- stalk-color-above-ring: brown=n,buff=b,cinnamon=c,gray=g,orange=o,
pink=p,red=e,white=w,yellow=y
- stalk-color-below-ring: brown=n,buff=b,cinnamon=c,gray=g,orange=o,
pink=p,red=e,white=w,yellow=y
- veil-type: partial=p,universal=u
- veil-color: brown=n,orange=o,white=w,yellow=y
- ring-number: none=n,one=o,two=t
- ring-type: cobwebby=c,evanescent=e,flaring=f,large=l,
none=n,pendant=p,sheathing=s,zone=z
- spore-print-color: black=k,brown=n,buff=b,chocolate=h,green=r,
orange=o,purple=u,white=w,yellow=y
- population: abundant=a,clustered=c,numerous=n,
scattered=s,several=v,solitary=y
- habitat: grasses=g,leaves=l,meadows=m,paths=p,
urban=u,waste=w,woods=d
8. Missing Attribute Values:
2480 of them (denoted by "?"), all for
attribute #11.
9. Class Distribution:
- edible: 4208 (51.8%)
- poisonous: 3916 (48.2%)
- total: 8124 instances
10. Modifications for Delve
Stalk-root (attribute 11) is not used in the eat prototask because it
has missing values.
