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...this is wrapped into an Sweaved document--we I don't see the graph on the screen--this error is difficult to catch while proofreading. Example: x0 <- c(-1, -4, 4.5) y0 <- c(-1, -4, -8) x1 <- c(2, -2, -3) y1 <- c(4, 4, 18) mylengths <- c(0.2, 0.3, 0.15) mycodes <- c(3, 2, 1) myangle <- c(10, 60, 80) plot(x = c(-5, 5), y = c(-10, 20), type = "n", xlab = "", ylab = "") arrows(x0 = x0, y0 = y0, x1 = x1, y1 = y1, length = mylengths, code = mycodes, angle = myangle) I found a workaround, but this is more difficult to explain to begin...

Hi! Could you tell me how I can draw a graph with error bars? Sorry, I don't use R that often and I couldn't find it easily in the documentation. TIA -- myriam -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info",

...quot;,"B","C","D"),fill=mycols) ### Still, I don't like the solid shades so much. ### fill up the bars with angled lines. ### density determines number of lines inside the bar. myden <- c(60,20,30,40,25) ### angles determines the direction of lines inside bars myangles <- c(20,-30,60,-40,10) barplot(x, names=mynames, las=2, col=mycols,density=myden,angle=c(20,60,-20)) legend(1,20,legend=c("A","B","C","D"),density=myden,angle=myangles) ### for my coupe de grace, lets do some writing in the bars. ### Recall from Verz...