R: Plot of Differential Evolution search path

plot.de-method {GA} | R Documentation

## Plot of Differential Evolution search path

### Description

The `plot` method for `de-class` objects gives a plot of best and average fitness values found during the iterations of the DE search.

### Usage

    ## S4 method for signature 'de'
    plot(x, y, ylim, cex.points = 0.7,
         col = c("green3", "dodgerblue3",  adjustcolor("green3", alpha.f = 0.1)),
         pch = c(16, 1), lty = c(1,2), legend = TRUE, grid = graphics:::grid, ...)

### Arguments

`x` | An object of class `"ga"`.
`y` | Not used.
`ylim` | A vector of two values specifying the limits on the y-axis.
`cex.points` | The magnification to be used for points.
`col` | The colours to be used for best and average fitness values.
`pch` | The type of points to be used for best and average fitness values.
`lty` | The type of lines to be used for best and average fitness values.
`legend` | A logical specifying if a legend should be included.
`grid` | A function for grid drawing of NULL to avoid drawing one.
`...` | Further arguments, currently not used.

### Details

Plot best and average fitness values at each iteration of DE search.

### Value

The method invisibly return a `data.frame` with the iterations and summary statistics for the fitness function evaluated at each iteration.

### Author(s)

Luca Scrucca

### See Also

`de`, `de-class`, `plot,de-method`.

### Examples

    # See examples in help(de)

[Package GA version 3.2.1 Index]