R: Mushroom Data Set

Mushroom {cba} | R Documentation

## Mushroom Data Set

### Description

A data set with descriptions of hypothetical samples corresponding to 23 species of gilled mushrooms in the Agaricus and Lepiota Family, classified according to their edibility as (definitely) ‘edible’ or ‘poisonous’ (definitely poisonous, or of unknown edibility and not recommended).

### Usage

    data("Mushroom")

### Format

A data frame with 8124 observations on the following 23 variables.

`class`

  a factor with levels `edible` and `poisonous`.

`cap-shape`

  a factor with levels `bell`, `conical`, `convex`, `flat`, `knobbed`, `sunken`.

`cap-surface`

  a factor with levels `fibrous`, `grooves`, `scaly`, `smooth`.

`cap-color`

  a factor with levels `brown`, `buff`, `cinnamon`, `gray`, `green`, `pink`, `purple`, `red`, `white`, `yellow`.

`bruises?`

  a factor with levels `bruises` and `no`.

`odor`

  a factor with levels `almond`, `anise`, `creosote`, `fishy`, `foul`, `musty`, `none`, `pungent`, `spicy`.

`gill-attachment`

  a factor with levels `attached` and `free`.

`gill-spacing`

  a factor with levels `close` and `crowded`.

`gill-size`

  a factor with levels `broad` and `narrow`.

`gill-color`

  a factor with levels `black`, `brown`, `buff`, `chocolate`, `gray`, `green`, `orange`, `pink`, `purple`, `red`, `white`, and `yellow`.

`stalk-shape`

  a factor with levels `enlarging` and `tapering`.

`stalk-root`

  a factor with levels `bulbous`, `club`, `equal`, and `rooted`.

`stalk-surface-above-ring`

  a factor with levels `fibrous`, `scaly`, `silky`, and `smooth`.

`stalk-surface-below-ring`

  a factor with levels `fibrous`, `scaly`, `silky`, and `smooth`.

`stalk-color-above-ring`

  a factor with levels `brown`, `buff`, `cinnamon`, `gray`, `orange`, `pink`, `red`, `white`, and `yellow`.

`stalk-color-below-ring`

  a factor with levels `brown`, `buff`, `cinnamon`, `gray`, `orange`, `pink`, `red`, `white`, and `yellow`.

`veil-type`

  a factor with levels `partial`.

`veil-color`

  a factor with levels `brown`, `orange`, `white`, and `yellow`.

`ring-number`

  a factor with levels `one`, `one`, and `two`.

`ring-type`

  a factor with levels `evanescent`, `flaring`, `large`, `none`, and `pendant`.

`spore-print-color`

  a factor with levels `black`, `brown`, `buff`, `chocolate`, `green`, `orange`, `purple`, `white`, and `yellow`.

`population`

  a factor with levels `abundant`, `clustered`, `numerous`, `scattered`, `several`, and `solitary`.

`habitat`

  a factor with levels `grasses`, `leaves`, `meadows`, `paths`, `urban`, `waste`, and `woods`.

### Details

The records are drawn from G. H. Lincoff (1981) (Pres.), The Audubon Society Field Guide to North American Mushrooms. New York: Alfred A. Knopf. (See pages 500–525 for the Agaricus and Lepiota Family.)

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.

Unused levels in the original data were dropped.

### Source

http://www.ics.uci.edu/~mlearn/MLRepository.html

### References

Blake, C.L. & Merz, C.J. (1998). UCI Repository of Machine Learning Databases. Irvine, CA: University of California, Department of Information and Computer Science.

### Examples

    data("Mushroom")
    summary(Mushroom)

[Package cba version 0.2-21 Index]