R: Product-Ratio Plot

PlotProductratio {DataVisualizations} | R Documentation

## Product-Ratio Plot

### Description

The product-ratio plot as defined in [Tukey, 1977, p. 594].

### Usage

    PlotProductratio(X, Y, na.rm = FALSE,

    main='Product Ratio Analysis',xlab = "Log of Ratio",ylab = "Root of Product", ...)

### Arguments

`X` | [1:n] positive numerical vector, negativ values are removed automatically
`Y` | [1:n] positive numerical vector, negativ values are removed automatically
`na.rm` | Function may not work with non finite values. If these cases should be automatically removed, set parameter TRUE
`main` | see `plot`
`ylab` | see `plot`
`xlab` | see `plot`
`...` | further arguments passed on to `plot`

### Details

In the case where there are many instances of very small values, but a small number of very large ones, this plot is usefull [Tukey, 1977, p. 615].

### Value

matrix[1:n,2] with sqrt(x*y) and log(x/y) as the two columns

### Author(s)

Michael Thrun

### References

[Tukey, 1977] Tukey, J. W.: Exploratory data analysis, United States Addison-Wesley Publishing Company, ISBN: 0-201-07616-0, 1977.

### Examples

    #Beware: The data does no fit ne requirements for this approach
    data('ITS')
    data(MTY)
    PlotProductratio(ITS,MTY)

[Package DataVisualizations version 1.2.3 Index]