Running examples in 'ggforce-Ex.R' failed
The error most likely occurred in:

> ### Name: scale_unit
> ### Title: Position scales for units data
> ### Aliases: scale_x_unit scale_y_unit scale_type.units
> 
> ### ** Examples
> 
> library(units)
udunits system database from D:/temp/RtmpSINsz8/RLIBS_2f24454457abe/units/share/udunits
> gallon <- as_units('gallon')
> mtcars$consumption <- mtcars$mpg * with(ud_units, mi / gallon)
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate '<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate '<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate '<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate '<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Y<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Z<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'E<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'P<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'T<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'G<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'M<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'k<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'h<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'da<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'd<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'c<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'm<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'u<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'n<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'p<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'f<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'a<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'z<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'y<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Y<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Z<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'E<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'P<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'T<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'G<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'M<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'k<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'h<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'da<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'd<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'c<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'm<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'u<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'n<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'p<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'f<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'a<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'z<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'y<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Y<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Z<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'E<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'P<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'T<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'G<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'M<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'k<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'h<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'da<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'd<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'c<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'm<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'u<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'n<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'p<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'f<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'a<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'z<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'y<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Y<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Z<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'E<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'P<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'T<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'G<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'M<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'k<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'h<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'da<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'd<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'c<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'm<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'u<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'n<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'p<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'f<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'a<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'z<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'y<U+2109>' to native encoding
> mtcars$power <- mtcars$hp * with(ud_units, hp)
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate '<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate '<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate '<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate '<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Y<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Z<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'E<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'P<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'T<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'G<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'M<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'k<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'h<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'da<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'd<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'c<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'm<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'u<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'n<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'p<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'f<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'a<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'z<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'y<U+2126>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Y<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Z<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'E<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'P<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'T<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'G<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'M<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'k<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'h<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'da<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'd<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'c<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'm<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'u<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'n<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'p<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'f<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'a<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'z<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'y<U+2033>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Y<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Z<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'E<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'P<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'T<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'G<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'M<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'k<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'h<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'da<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'd<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'c<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'm<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'u<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'n<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'p<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'f<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'a<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'z<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'y<U+2103>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Y<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'Z<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'E<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'P<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'T<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'G<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'M<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'k<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'h<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'da<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'd<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'c<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'm<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'µ<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'u<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'n<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'p<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'f<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'a<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'z<U+2109>' to native encoding
Warning in eval(substitute(expr), data, enclos = parent.frame()) :
  unable to translate 'y<U+2109>' to native encoding
> 
> # Use units encoded into the data
> ggplot(mtcars) +
+   geom_point(aes(power, consumption))
Error in Ops.units(x, range[1]) : 
  both operands of the expression should be "units" objects
Calls: <Anonymous> ... f -> <Anonymous> -> f -> <Anonymous> -> f -> Ops.units
Execution halted