eqscplot {MASS}R Documentation

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


eqscplot(x, y, ratio = 1, tol = 0.04, uin, ...)



vector of x values, or a 2-column matrix, or a list with components x and y


vector of y values


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.


proportion of white space at the margins of plot


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.


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.


invisibly, the values of uin used for the plot.

Side Effects

performs the plot.


Arguments ratio and uin were suggested by Bill Dunlap.


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

See Also

plot, par

[Package MASS version 7.3-51.4 Index]