Delete a List Component in R

June 24, 2009

(This article was first published on Yu-Sung Su's Blog, and kindly contributed to R-bloggers)

In R, the way to delete a component in a list object is different from matrix and vector objects. For a vector, to delete an element:vec <- c(1, 2, 3)vec <- vec[-3]For a matrix, to delete a row or a column:mat <- matrix(c(1,2,3,4), 2, 2)mat2 <- mat[-1,] # delete a rowmat3 <- mat[,-1] # delete a columnFor a list, to delete a component:lis <- vector("list", 3)lis[[3]] <- NULLJust assign a NULL

To leave a comment for the author, please follow the link and comment on their blog: Yu-Sung Su's Blog. offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series, trading) and more...

If you got this far, why not subscribe for updates from the site? Choose your flavor: e-mail, twitter, RSS, or facebook...


Comments are closed.

Search R-bloggers


Never miss an update!
Subscribe to R-bloggers to receive
e-mails with the latest R posts.
(You will not see this message again.)

Click here to close (This popup will not appear again)