eqscplot

0th

Percentile

Plots with Geometrically Equal Scales

Version of a scatterplot with scales chosen to be equal on both axes, that is 1cm represents the same units on each

Keywords
hplot
Usage
eqscplot(x, y, ratio = 1, tol = 0.04, uin, ...)
Arguments
x
vector of x values, or a 2-column matrix, or a list with components x and y
y
vector of y values
ratio
desired ratio of units on the axes. Units on the y axis are drawn at ratio times the size of units on the x axis. Ignored if uin is specified and of length 2.
tol
proportion of white space at the margins of plot
uin
desired values for the units-per-inch parameter. If of length 1, the desired units per inch on the x axis.
...
further arguments for plot and graphical parameters. Note that par(xaxs="i", yaxs="i") is enforced, and xlim and ylim will be adjusted accordingly.
Details

Limits for the x and y axes are chosen so that they include the data. One of the sets of limits is then stretched from the midpoint to make the units in the ratio given by ratio. Finally both are stretched by 1 + tol to move points away from the axes, and the points plotted.

Value

• invisibly, the values of uin used for the plot.

Note

Arguments ratio and uin were suggested by Bill Dunlap.

Side Effects

performs the plot.

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

plot, par