cane {boot} | R Documentation

## Sugar-cane Disease Data

### Description

The `cane` data frame has 180 rows and 5 columns. The data frame represents a randomized block design with 45 varieties of sugar-cane and 4 blocks.

### Usage

    cane

### Format

This data frame contains the following columns:

`n`
  The total number of shoots in each plot.
`r`
  The number of diseased shoots.
`x`
  The number of pieces of the stems, out of 50, planted in each plot.
`var`
  A factor indicating the variety of sugar-cane in each plot.
`block`
  A factor for the blocks.

### Details

The aim of the experiment was to classify the varieties into resistant, intermediate and susceptible to a disease called "coal of sugar-cane" (carvao da cana-de-acucar). This is a disease that is common in sugar-cane plantations in certain areas of Brazil.

For each plot, fifty pieces of sugar-cane stem were put in a solution containing the disease agent and then some were planted in the plot. After a fixed period of time, the total number of shoots and the number of diseased shoots were recorded.

### Source

The data were kindly supplied by Dr. C.G.B. Demetrio of Escola Superior de Agricultura, Universidade de Sao Paolo, Brazil.

### References

Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.

[Package boot version 1.2-30 Index]