leave out integration with transform_exp() for now (#476)

Author: teunbrand

NEWS.md

@@ -4,7 +4,7 @@
   ranges (#435).
 * New `label_date_short(leading)` argument to replace leading zeroes (#442)
 * `breaks_pretty()` will return the input limit when it has no range (#446)
-* `transform_exp()` now has more sensible breaks, available in `breaks_exp()` 
+* `breaks_exp()` now provides more sensible breaks for the exponential transform
   (@teunbrand, #405).
 * The scales package now keeps track of known palettes. These can be retrieved
   using `get_palette()` or registered using `set_palette()` (#396).

R/transform-numeric.R

@@ -255,8 +255,7 @@ transform_exp <- function(base = exp(1)) {
     function(x) base^x,
     function(x) log(x, base = base),
     d_transform = function(x) base^x * log(base),
-    d_inverse = function(x) 1 / x / log(base),
-    breaks = breaks_exp(),
+    d_inverse = function(x) 1 / x / log(base)
   )
 }