Mushrooms data

Source: R/FFTreesdata_doc.R

Data describing poisonous vs. non-poisonous mushrooms.

mushrooms

Format

A data frame containing 8,124 rows and 23 columns.

See http://archive.ics.uci.edu/ml/machine-learning-databases/mushroom/agaricus-lepiota.names for column descriptions.

poisonous

Criterion: Is the mushroom poisonous?

Values: TRUE (poisonous) vs. FALSE (eatable) (48.2% vs.\ 52.8%).

cshape

cap-shape, character (bell=b, conical=c, convex=x, flat=f, knobbed=k, sunken=s)

csurface

cap-surface, character (fibrous=f, grooves=g, scaly=y, smooth=s)

ccolor

cap-color, character (brown=n, buff=b, cinnamon=c, gray=g, green=r, pink=p, purple=u, red=e, white=w, yellow=y)

bruises

Are there bruises? logical (TRUE/FALSE)

odor

character (almond=a, anise=l, creosote=c, fishy=y, foul=f, musty=m, none=n, pungent=p, spicy=s)

gattach

gill-attachment, character (attached=a, descending=d, free=f, notched=n)

gspace

gill-spacing, character (close=c, crowded=w, distant=d)

gsize

gill-size, character (broad=b, narrow=n)

gcolor

gill-color, character (black=k, brown=n, buff=b, chocolate=h, gray=g, green=r, orange=o, pink=p, purple=u, red=e, white=w, yellow=y)

sshape

stalk-shape, character (enlarging=e, tapering=t)

sroot

stalk-root, character (bulbous=b ,club=c, cup=u, equal=e, rhizomorphs=z, rooted=r)

ssaring

stalk-surface-above-ring, character (fibrous=f, scaly=y, silky=k, smooth=s)

ssbring

stalk-surface-below-ring, character (fibrous=f, scaly=y, silky=k, smooth=s)

scaring

stalk-color-above-ring, character (brown=n, buff=b, cinnamon=c, gray=g, orange=o, pink=p, red=e, white=w, yellow=y)

scbring

stalk-color-below-ring, character (brown=n, buff=b, cinnamon=c, gray=g, orange=o, pink=p, red=e, white=w, yellow=y)

vtype

veil-type, character (partial=p, universal=u)

vcolor

veil-color, character (brown=n, orange=o, white=w, yellow=y)

ringnum

character (none=n, one=o, two=t)

ringtype

character (cobwebby=c, evanescent=e, flaring=f, large=l, none=n, pendant=p, sheathing=s, zone=z)

sporepc

spore-print-color, character (black=k, brown=n, buff=b, chocolate=h, green=r, orange=o, purple=u, white=w, yellow=y)

population

character(abundant=a, clustered=c, numerous=n, scattered=s, several=v, solitary=y)

habitat

character (grasses=g, leaves=l, meadows=m, paths=p, urban=u, waste=w, woods=d)

Details

This dataset includes descriptions of hypothetical samples corresponding to 23 species of gilled mushrooms in the Agaricus and Lepiota Family. Each species is classified as poisonous (True or False). 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.

We made the following enhancements to the original data for improved usability:

  • Any missing values, denoted as "?" in the dataset, were transformed into NAs.

  • Binary factor variables with exclusive "t" and "f" values were converted to logical TRUE/FALSE vectors.

  • The binary factor criterion variable with exclusive "p" and "e" values was converted to a logical TRUE/FALSE vector.

Other than that, the data remains consistent with the original dataset.

References

Mushroom records drawn from The Audubon Society Field Guide to North American Mushrooms (1981). G.H. Lincoff (Pres.), New York: A.A. Knopf.