# eafplot: Plot the Empirical Attainment Function for two objectives In eaf: Plots of the Empirical Attainment Function

 eafplot R Documentation

## Plot the Empirical Attainment Function for two objectives

### Description

Computes and plots the Empirical Attainment Function, either as attainment surfaces for certain percentiles or as points.

### Usage

``````eafplot(x, ...)

## Default S3 method:
eafplot(
x,
sets = NULL,
groups = NULL,
percentiles = c(0, 50, 100),
attsurfs = NULL,
xlab = NULL,
ylab = NULL,
xlim = NULL,
ylim = NULL,
log = "",
type = "point",
col = NULL,
lty = c("dashed", "solid", "solid", "solid", "dashed"),
lwd = 1.75,
pch = NA,
cex.pch = par("cex"),
las = par("las"),
legend.pos = "topright",
legend.txt = NULL,
extra.points = NULL,
extra.legend = NULL,
extra.pch = 4:25,
extra.lwd = 0.5,
extra.lty = NA,
extra.col = "black",
maximise = c(FALSE, FALSE),
xaxis.side = "below",
yaxis.side = "left",
axes = TRUE,
sci.notation = FALSE,
...
)

## S3 method for class 'formula'
eafplot(formula, data, groups = NULL, subset = NULL, ...)

## S3 method for class 'list'
eafplot(x, ...)
``````

### Arguments

 `x` Either a matrix of data values, or a data frame, or a list of data frames of exactly three columns. `...` Other graphical parameters to `plot.default()`. `sets` (numeric) Vector indicating which set each point belongs to. `groups` This may be used to plot profiles of different algorithms on the same plot. `percentiles` (`numeric()`) Vector indicating which percentile should be plot. The default is to plot only the median attainment curve. `attsurfs` TODO `xlab, ylab, xlim, ylim, log, col, lty, lwd, pch, cex.pch, las` Graphical parameters, see `plot.default()`. `type` (`character(1)`) string giving the type of plot desired. The following values are possible, ‘⁠points⁠’ and ‘⁠area⁠’. `legend.pos` the position of the legend, see `legend()`. A value of `"none"` hides the legend. `legend.txt` a character or expression vector to appear in the legend. If `NULL`, appropriate labels will be generated. `extra.points` A list of matrices or data.frames with two-columns. Each element of the list defines a set of points, or lines if one of the columns is `NA`. `extra.legend` A character vector providing labels for the groups of points. `extra.pch, extra.lwd, extra.lty, extra.col` Control the graphical aspect of the points. See `points()` and `lines()`. `maximise` (`logical()` | `logical(1)`) Whether the objectives must be maximised instead of minimised. Either a single logical value that applies to all objectives or a vector of logical values, with one value per objective. `xaxis.side` On which side that xaxis is drawn. Valid values are "below" and "above". See `axis()`. `yaxis.side` On which side that yaxis is drawn. Valid values are "left" and "right". See `axis()`. `axes` A logical value indicating whether both axes should be drawn on the plot. `sci.notation` Generate prettier labels `formula` A formula of the type: `time + cost ~ run | instance` will draw `time` on the x-axis and `cost` on the y-axis. If `instance` is present the plot is conditional to the instances. `data` Dataframe containing the fields mentioned in the formula and in groups. `subset` (`integer()` | `NULL`) A vector indicating which rows of the data should be used. If left to default `NULL` all data in the data frame are used.

### Details

This function can be used to plot random sets of points like those obtained by different runs of biobjective stochastic optimization algorithms. An EAF curve represents the boundary separating points that are known to be attainable (that is, dominated in Pareto sense) in at least a fraction (quantile) of the runs from those that are not. The median EAF represents the curve where the fraction of attainable points is 50%. In single objective optimization the function can be used to plot the profile of solution quality over time of a collection of runs of a stochastic optimizer.

### Value

Return (invisibly) the attainment surfaces computed.

### Methods (by class)

• `default`: Main function

• `formula`: Formula interface

• `list`: List interface for lists of data.frames or matrices

`read_datasets()` `eafdiffplot()` `pdf_crop()`

### Examples

``````data(gcp2x2)
tabucol <- subset(gcp2x2, alg != "TSinN1")
tabucol\$alg <- tabucol\$alg[drop=TRUE]
eafplot(time + best ~ run, data = tabucol, subset = tabucol\$inst=="DSJC500.5")

## Not run: # These take time
eafplot(time + best ~ run | inst, groups=alg, data=gcp2x2)
eafplot(time + best ~ run | inst, groups=alg, data=gcp2x2,
percentiles=c(0,50,100), cex.axis = 0.8, lty = c(2,1,2), lwd = c(2,2,2),
col = c("black","blue","grey50"))

extdata_path <- system.file(package = "eaf", "extdata")
A1 <- read_datasets(file.path(extdata_path, "ALG_1_dat.xz"))
A2 <- read_datasets(file.path(extdata_path, "ALG_2_dat.xz"))
eafplot(A1, percentiles = 50, sci.notation = TRUE, cex.axis=0.6)
# The attainment surfaces are returned invisibly.
attsurfs <- eafplot(list(A1 = A1, A2 = A2), percentiles = 50)
str(attsurfs)

## Save as a PDF file.
# dev.copy2pdf(file = "eaf.pdf", onefile = TRUE, width = 5, height = 4)

## End(Not run)

## Using extra.points
## Not run:
data(HybridGA)
data(SPEA2relativeVanzyl)
eafplot(SPEA2relativeVanzyl, percentiles = c(25, 50, 75),
xlab = expression(C[E]), ylab = "Total switches", xlim = c(320, 400),
extra.points = HybridGA\$vanzyl, extra.legend = "Hybrid GA")

data(SPEA2relativeRichmond)
eafplot (SPEA2relativeRichmond, percentiles = c(25, 50, 75),
xlab = expression(C[E]), ylab = "Total switches",
xlim = c(90, 140), ylim = c(0, 25),
extra.points = HybridGA\$richmond, extra.lty = "dashed",
extra.legend = "Hybrid GA")

eafplot (SPEA2relativeRichmond, percentiles = c(25, 50, 75),
xlab = expression(C[E]), ylab = "Total switches",
xlim = c(90, 140), ylim = c(0, 25), type = "area",
extra.points = HybridGA\$richmond, extra.lty = "dashed",
extra.legend = "Hybrid GA", legend.pos = "bottomright")

data(SPEA2minstoptimeRichmond)
SPEA2minstoptimeRichmond[,2] <- SPEA2minstoptimeRichmond[,2] / 60
eafplot (SPEA2minstoptimeRichmond, xlab = expression(C[E]),
ylab = "Minimum idle time (minutes)", maximise = c(FALSE, TRUE),
las = 1, log = "y", main = "SPEA2 (Richmond)",
legend.pos = "bottomright")

## End(Not run)
``````

eaf documentation built on March 31, 2023, 9:08 p.m.