R frustration of the day
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
offers daily e-mail updates
news and tutorials
on topics such as: visualization (ggplot2
), programming (RStudio
, Web Scraping
) statistics (regression
, time series
) and more...
If you got this far, why not subscribe for updates
from the site? Choose your flavor: e-mail
, or facebook