coord_equal

coord_equal(ratio=1, ...)

Equal scale cartesian coordinates

An equal scale coordinate system plays a similar role to ?eqscplot in MASS, but it works for all types of graphics, not just scatterplots.

This coordinate system has one parameter, ratio, which specifies the ratio between the x and y scales. An aspect ratio of two means that the plot will be twice as high as wide. An aspection ratio of 1/2 means that the plot will be twice as wide as high. By default, the aspect.ratio of the plot will also be set to this value.

This page describes coord_equal, see layer and qplot for how to create a complete plot from individual components.

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Parameters

Parameters control the appearance of the coord. In addition to the parameters listed below (if any), any aesthetic can be used as a parameter, in which case it will override any aesthetic mapping.

ratio: NULL

Returns

This function returns a coordinate system object.

Examples

> # coord_equal ensures that the ranges of axes are equal to the 
> # specified ratio (1 by default, indicating equal ranges). 
>  
> qplot(mpg, wt, data = mtcars) + coord_equal(ratio = 1) 
  
> qplot(mpg, wt, data = mtcars) + coord_equal(ratio = 5) 
  
> qplot(mpg, wt, data = mtcars) + coord_equal(ratio = 1/5) 
  
>  
> # Resize the plot, and you'll see that the specified aspect ratio is 
> # mantained

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