r - picker() from manipulate package with accented characteres -


i'm using picker() function manipulate ggplot2 line graph. have strings accented characters in list given picker. when select string accented characters, ggplot() returns 

error in plot.window(xlim, ylim, log = log, ...).

the sample code works fine:

manipulate(     barplot(as.matrix(longley[,factor]),              beside = true, main = factor),     factor = picker("gnp", "unemployed", "employed"))

however, if adapt code follows, picker() fails:

library(manipulate)  dflongley <- longley colnames(dflongley)[7] <- "employé" encoding(colnames(dflongley)) <- "utf-8"  x <- c("gnp", "unemployed", "employé") encoding(x) <- "utf-8"  manipulate(     barplot(as.matrix(dflongley[,factor]),              beside = true, main = factor),     factor = picker(as.list(x)))

head(dflongley, 1) gives this:

 gnp.deflator     gnp unemployed armed.forces population year employ<u+00e9>  1947           83 234.289      235.6          159    107.608 1947         60.323

x:

[1] "gnp"          "unemployed"   "employ<u+00e9>"

when "employé" selected, null passed picker() barplot() , following errors:

error in plot.window(xlim, ylim, log = log, ...) :    need finite 'xlim' values in addition: warning messages: 1: in min(w.l) : no non-missing arguments min; returning inf 2: in max(w.r) : no non-missing arguments max; returning -inf 3: in min(x) : no non-missing arguments min; returning inf 4: in max(x) : no non-missing arguments max; returning -inf

any idea of wrong?

the problem solved looking @ this question, , adjusting system preferences command: system("defaults write org.r-project.r force.lang en_us.utf-8")


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