ShortCut[R]: locator
[This article was first published on binfalse » R, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Welcome to my new category: ShortCut! Here I’ll shortly explain some smart features, unknown extensions or uncommon pathways of going for gold.
Today it’s about the Gnu R tool locator.
With locator you are able to detect the mouse position inside you plot. Just run locator() and click some points, when you’re finished click the right button and locator will print the x– and y-values of the clicked positions.
With this tool it’s possible to visually validate some numerical calculation.
With a little bit more code, you can output the coordinates right into you plot:
1 2 3 | > x<-seq (0, 10, .01) > plot (x, dgamma (x, rnorm (1, 2, 0.5), rnorm (1, 1, 0.5)), t=‘l’, main=‘any curve’, ylab=‘y’) > text (p<-locator (1), paste (p, collapse=“\n“), adj=0) |
Figure 1: locator example
With a click into the plot you’ll be able to create a result like figure 1.
To leave a comment for the author, please follow the link and comment on their blog: binfalse » R.
R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.