Format aesthetics for the supplementary (new) biplot axes

This function allows the user to format the aesthetics for the supplementary (new) biplot axes.

newaxes(bp, X.new.names=bp$var.names, which = 1:bp$num.vars, col = "orange", lwd = 1, 
lty = 1, label.dir = "Orthog", label.col = col, label.cex = 0.75, label.line = 0.1, 
ticks = 5, tick.col = col, tick.size = 1, tick.label = TRUE, tick.label.col = tick.col, 
tick.label.cex = 0.6, tick.label.side = "below", predict.col = col, predict.lwd = lwd, 
predict.lty = lty, ax.names = X.new.names, orthogx = 0, orthogy = 0)

Arguments

bp

an object of class biplot.

X.new.names

a vector of the new column names of bp to specify which axes should be labelled.

which

a vector containing the new columns or variables for which the axes should be displayed, with default 1:num.vars.

col

the colour(s) for the axes, with default grey(0.7). Alternatively, provide a vector of colours corresponding to X.names.

lwd

the line width(s) for the axes, with default 1.

lty

the line type(s) for the axes, with default 1.

label.dir

a character string indicating the placement of the axis titles to the side of the figure. One of "Orthog" for axis titles to appear orthogonal to the side of the figure (default) , "Hor" for axis titles to appear horizontally or "Paral" for axis titles to appear parallel to the side of the figure.

label.col

the colour(s) for the axis labels, with default, col.

label.cex

the label expansion for the axis labels, with default 0.75.

label.line

the distance of the axis title from the side of the figure, with default 0.1.

ticks

an integer-valued vector indicating the number of tickmarks for each axis, with default 5 for each axis.

tick.col

the colour(s) for the tick marks, with default col.

tick.size

a vector specifying the sizes of tick marks for each axis, with default 1 for each .

tick.label

a logical value indicating whether the axes should be labelled, with default TRUE.

tick.label.col

the colour(s) for the tick mark labels, with default tick.col.

tick.label.cex

the label expansion for the tick mark labels, with default 0.6.

tick.label.side

a character string indicating the position of the tick label. One of "below" for the label to appear below the tick mark (default) or "above" for the label to appear above the tick mark.

predict.col

the colour(s) for the predicted samples, with default col.

predict.lwd

the line width(s) for the predicted samples, with default lwd.

predict.lty

the line type(s) for the predicted samples, with default lty.

ax.names

a vector of size p containing user defined titles for the axes.

orthogx

a numeric vector of size p specifying the x-coordinate of the parallel transformation of each axis, with default 0 for each axis. This is only used when dim.biplot = 2.

orthogy

a numeric vector of size p specifying the y-coordinate of the parallel transformation of each axis, with default 0 for each axis. This is only used when dim.biplot = 2.

Value

The object of class biplot will be appended with a list called newaxes containing elements similar to that of axes.

See also

biplot, axes

Examples

biplot(data = iris[,1:2]) |> PCA() |> interpolate(newvariable = iris[3:4]) |> 
  newaxes(col="gold") |> plot()