>>>>> Ralf Stubner >>>>> on Fri, 25 May 2018 19:18:58 +0200 writes:
> Dear all, I would like to draw you attention to this > question on SO: > https://stackoverflow.com/questions/50372043/readlines-function-with-new-version-of-r > Based on the OP's code I used the script > ####################################### > create_matrix <- function() { > cat("Write the numbers of vertices: ") > user_input <- readLines("stdin", n=1) > user_input <- as.numeric(user_input) > print(user_input) > } > create_matrix() > ####################################### > and called it with "R -f <filename>" from the command line. > With 'R version 3.4.4 (2018-03-15) -- "Someone to Lean On"' the script > prints the inputed number as expected. With both 'R version 3.5.0 > (2018-04-23) -- "Joy in Playing"' and 'R Under development (unstable) > (2018-05-19 r74746) -- "Unsuffered Consequences"' the script does not > continue after inputing a number. I can confirm. It "works" if you additionally (the [Enter], i.e., EOL) you also "send" an EOF -- in Unix alikes via <Ctrl>-D The same happens if you use 'Rscript <filename>' I'm not the expert here, but am close to sure that we (R core) did not intend this change, when fixing other somewhat subtle bugs in Rscript / 'R -f' Martin Maechler > All these tests where done using docker images from the rocker project, > i.e. effectively using Debian Linux. > Is this an error in the script or in R? > Thanks > Ralf > -- > Ralf Stubner > Senior Software Engineer / Trainer > daqana GmbH > Dortustraße 48 > 14467 Potsdam > T: +49 331 23 61 93 11 > F: +49 331 23 61 93 90 > M: +49 162 20 91 196 > Mail: ralf.stub...@daqana.com > Sitz: Potsdam > Register: AG Potsdam HRB 27966 P > Ust.-IdNr.: DE300072622 > Geschäftsführer: Prof. Dr. Dr. Karl-Kuno Kunze > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel