r - How do I generate a boxplot using the original data order (not alphabetical)? -

i new r. i've made boxplot of data r sorting factors alphabetically. how maintain original order of data? code:

boxplot(ms~code,data=input) 

i have 40 variables wish boxplot in same order original data frame lists them. i've read may able set sort.names=false maintain original order don't understand piece of code go.

is there way redefine input before goes boxplot?

thank you.

factor variable again wish in line 3

data(insectsprays) data <- insectsprays data$spray <- factor(data$spray, c("b", "c", "d", "e", "f", "g", "a")) boxplot(count ~ spray, data = data, col = "lightgray") 

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the answer above 98% of way there.

set.seed(1) # original order e - input <- data.frame(code=rep(rev(letters[1:5]),each=5),                     ms=rnorm(25,sample(1:5,5))) boxplot(ms~code,data=input)   # plots alphabetically 

input$code <- with(input,factor(code,levels=unique(code))) boxplot(ms~code,data=input)   # plots in original order