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....xls", sheetIndex = 1) I promptly get an error message: Error in .jcall(row[[ir]], "Lorg/apache/poi/xssf/usermodel/XSSFCell;", : method getCell with signature (I)Lorg/apache/poi/xssf/usermodel/XSSFCell; not found Anyone have any idea how to fix this issue? Thanks, Andrew Winterman [[alternative HTML version deleted]]

...ntroduced the extrafont package, and demonstrated how to use alternative fonts for text in R graphics: http://bit.ly/VAGKXG Guest blogger Alex Guazzelli describes how the PMML standard and R are used to deploy predictive models to production environments: http://bit.ly/VAGLe3 Guest blogger Andrew Winterman uses R to design interactive data applications: http://bit.ly/VAGLe2 Guest blogger Ron Fredericks shares tips on making videos of R user group meetings, and links to a presentation about Rhipe at Facebook: http://bit.ly/VAGIz2 Guest blogger Garrett Grolemund introduced the ggsubplot package, and...

Hey there, I've got a for loop in my code which I'm having difficulty seeing how to avoid. Here's the code, with some sample data. You can safely copy and paste into the interpreter if you want. #I have some data frames. a <- as.data.frame(matrix(runif(50), nrow = 10, ncol = 5)) b <- as.data.frame(matrix(runif(50), nrow = 10, ncol = 6)) c <-as.data.frame( matrix(runif(50),