This dataset is a modified version of the mushroom dataset drawn from
The Audubon Society Field Guide to North American Mushrooms
(1981). G. H. Lincoff (Pres.), New York: Alfred A. Knopf

The original dataset can be downloaded at http://archive.ics.uci.edu/ml/datasets/Mushroom

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.

The first column is the class and the next 22 columns are the attributes.

Class and attribute Information: 
     1. classes:                  edible=e, poisonous=p
     2. cap-shape:                bell=b,conical=c,convex=x,flat=f,
                                  knobbed=k,sunken=s
     3. cap-surface:              fibrous=f,grooves=g,scaly=y,smooth=s
     4. cap-color:                brown=n,buff=b,cinnamon=c,gray=g,green=r,
                                  pink=p,purple=u,red=e,white=w,yellow=y
     5. bruises?:                 bruises=t,no=f
     6. odor:                     almond=a,anise=l,creosote=c,fishy=y,foul=f,
                                  musty=m,none=n,pungent=p,spicy=s
     7. gill-attachment:          attached=a,descending=d,free=f,notched=n
     8. gill-spacing:             close=c,crowded=w,distant=d
     9. gill-size:                broad=b,narrow=n
     10. 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
    11. stalk-shape:              enlarging=e,tapering=t
    12. stalk-root:               bulbous=b,club=c,cup=u,equal=e,
                                  rhizomorphs=z,rooted=r,missing=?
    13. stalk-surface-above-ring: fibrous=f,scaly=y,silky=k,smooth=s
    14. stalk-surface-below-ring: fibrous=f,scaly=y,silky=k,smooth=s
    15. stalk-color-above-ring:   brown=n,buff=b,cinnamon=c,gray=g,orange=o,
                                  pink=p,red=e,white=w,yellow=y
    16. stalk-color-below-ring:   brown=n,buff=b,cinnamon=c,gray=g,orange=o,
                                  pink=p,red=e,white=w,yellow=y
    17. veil-type:                partial=p,universal=u
    18. veil-color:               brown=n,orange=o,white=w,yellow=y
    19. ring-number:              none=n,one=o,two=t
    20. ring-type:                cobwebby=c,evanescent=e,flaring=f,large=l,
                                  none=n,pendant=p,sheathing=s,zone=z
    21. spore-print-color:        black=k,brown=n,buff=b,chocolate=h,green=r,
                                  orange=o,purple=u,white=w,yellow=y
    22. population:               abundant=a,clustered=c,numerous=n,
                                  scattered=s,several=v,solitary=y
    23. 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