Hi, In HTML there is a way to measure the width of a Text before printing it on screen as in https://www.w3schools.com/tags/canvas_measuretext.asp In R we have nchar() function which just measures the number of letters in a Text, but I wonder if we can measure the width of text as well. I have a shiny app where I need to print a text in an Area onto the screen which has a specific width, so some the texts are not showing within that area (overflowing), where some are though all of them have the equal number of letters. Thanks for any input.
Width of a text
3 messages · Christofer Bogaso, Ben Tupper, Duncan Murdoch
Hi, Does strwidth() do the trick? https://www.rdocumentation.org/packages/graphics/versions/3.5.1/topics/strwidth <https://www.rdocumentation.org/packages/graphics/versions/3.5.1/topics/strwidth> Ben
On Dec 12, 2018, at 6:55 AM, Christofer Bogaso <bogaso.christofer at gmail.com> wrote: Hi, In HTML there is a way to measure the width of a Text before printing it on screen as in https://www.w3schools.com/tags/canvas_measuretext.asp In R we have nchar() function which just measures the number of letters in a Text, but I wonder if we can measure the width of text as well. I have a shiny app where I need to print a text in an Area onto the screen which has a specific width, so some the texts are not showing within that area (overflowing), where some are though all of them have the equal number of letters. Thanks for any input. [[alternative HTML version deleted]]
______________________________________________ R-help at 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.
Ben Tupper Bigelow Laboratory for Ocean Sciences 60 Bigelow Drive, P.O. Box 380 East Boothbay, Maine 04544 http://www.bigelow.org Ecological Forecasting: https://eco.bigelow.org/
On 12/12/2018 6:55 AM, Christofer Bogaso wrote:
Hi, In HTML there is a way to measure the width of a Text before printing it on screen as in https://www.w3schools.com/tags/canvas_measuretext.asp In R we have nchar() function which just measures the number of letters in a Text, but I wonder if we can measure the width of text as well. I have a shiny app where I need to print a text in an Area onto the screen which has a specific width, so some the texts are not showing within that area (overflowing), where some are though all of them have the equal number of letters.
Since Shiny displays in a web browser, it will be up to the web browser to measure the text. (How would R know the font, magnification, etc?) You'll have to do this in Javascript. If your R code needs to know the answer, Shiny provides a way to send the result back to R. It's not trivial, but you can read how to do it here: <https://shiny.rstudio.com/articles/js-send-message.html>. Duncan Murdoch
Thanks for any input. [[alternative HTML version deleted]]
______________________________________________ R-help at 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.