ggplot2tutorial14.R

# We need to use the trans_new() function which is in the scales library. Remember to load that library.

# We create a new function with the _trans suffix. Inside that function we use the trans_new
# function to define the transformation name and the actual transformation. To see why I repeated the
# the transformation check the documentation for trans_new.
mult_trans = function() trans_new("mult", function(x) 1*x, function(x) 1*x)

# If you're planning to use this code to build your own transformations remember to change
# the name of the function(something_trans), the character string inside trans_new and the actual transformation.

# Once that's done, simply call the function with the coord_trans function.
ggplot(housing, aes(x=Land.Price.Index, y=Home.Price.Index)) + geom_point() + coord_trans(x="sqrt", y="mult")