Hi Luigi add strip.custom argument
barchart(test ~ count|assay, df, groups = res, stack = TRUE, main = "Comparison of test results", xlab = "Count", col = c("yellow", "blue"), strip = strip.custom(factor.levels = c("molecular test","serological test"), par.strip.text = list(cex = 1) ), par.settings = list( strip.background = list(col="light grey"), superpose.polygon=list(col= c("yellow", "blue")) ), scales = list(alternating = FALSE), key = list( space="top", columns=2, text=list(c("Negative", "Positive"), col="black"), rectangles=list(col=c("yellow", "blue")) ) ) -----Original Message----- From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Luigi Marongiu Sent: Tuesday, 1 September 2015 06:18 To: r-help Subject: [R] modify strip labels with given text using lattice package Dear all, I am drawing a barchart plot with lattice and the resulting strips are taking the value of the variable being compared (in this example "assay"). However I would like to write myself the value to place into the strips, let's say I want to call the variables as "molecular test" and "serological test" the values "a" and "b" respectively within "assay". I have tried different approaches taken from the web but nothing worked. Would you have any tip? Best regards Luigi >>> test <- rep(c("Adenovirus", "Rotavirus", "Norovirus", "Rotarix", "Sapovirus"), 2) res <- c(0, 1, 0, 1,0, 1,0, 1,0, 1, 0, 1, 0, 1,0, 1,0, 1,0, 1) count <- rnorm(20) assay <- c(rep("a", 10), rep("b", 10)) df <- data.frame(test, res, count, assay, stringsAsFactors = FALSE) library(lattice) barchart( test ~ count|assay, df, groups = res, stack = TRUE, main = "Comparison of test results", xlab = "Count", col = c("yellow", "blue"), par.settings = list( strip.background = list(col="light grey"), superpose.polygon=list(col= c("yellow", "blue")) ), scales = list( alternating = FALSE ), key = list( space="top", columns=2, text=list(c("Negative", "Positive"), col="black"), rectangles=list(col=c("yellow", "blue")) ) ) ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.