Hi There, I have created the following function
format<- function(){ repeat { form<-readline(paste("\nIn what format do you want to save these plots?\nChoose from: wmf, emf, png, jpg, jpeg, bmp, tif, tiff, ps, eps, or pdf.\nNote: eps is the suggested format for publication quality plots.\nPlot format --> ")); cat("\nI'm sorry, I don't know what that format is.\nPlease try again\nPress ENTER...");readline()} if (form == c("wmf", "emf", "png", "jpg", "jpeg", "bmp", "tif", "tiff", "ps", "eps", "pdf")) {break} } How do I get the program to recognise that the user has entered one of the formats in the last line? Even entering "png" insted of png at the prompt doesn't seem to work. Will the loop only break if I enter all of the possible formats? Thanks in advance, James -- View this message in context: http://www.nabble.com/Loop-function-comparison-operator-problem-tp25757203p25757203.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.