[This article was first published on Statistics Blog » 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.
Whenever you take a 1 column slice of a matrix, that gets automatically converted into a vector. But if you take a slice of several columns, it remains a matrix. The problem is you don’t always know in advance how big the slice will be, so if you do this:
You'll get an error if x is 1. This creates the worst kind of bug: an intermittent one that will hide until the right (wrong?) value of x occurs. To fix the problem you need to RE-declare the slice to be a matrix with ncol=x after you take the slice.
To leave a comment for the author, please follow the link and comment on their blog: Statistics Blog » 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.