search for: alphebetical

Dear List, I know this has been covered before, but I don't seem to be able to get it right. I am constructing a boxplot in lattice and can't get the scales in the correct alphebetical order. I have already read that this is due to the way factors are treated, and I have to redefine the levels of the factors. However, I have failed. As a simple example: library(lattice) id<-rep(letters[1:9], each=20) x<-rep(seq(1:10),each=18) y<-rnorm(180,50,20) #Reverse alphebetic...

...ataframe in alphebitical order with row numbers in #numerical order. > xy x y 1 a 8.921657 2 b 10.314625 3 c 9.531537 4 d 10.818563 5 e 9.084872 #If I re-order the data based on the value of y xy<-xy[order(y),] #I get a dataframe ordered by y but the row numbers are still in #alphebetical order based on x > xy x y 1 a 8.921657 5 e 9.084872 3 c 9.531537 2 b 10.314625 4 d 10.818563 #I then try to plot the data and it plots it in alphabetical instead of #numeric order library(lattice) barchart(y~x, data=xy) Why are the rows not re-indexed, and how do I get barchart(...