R tip iterating over list

To iterate over a list by key, value pair, do this:

for (name in names(myList)) {
    print(name)<br />
    print(myList[[name]])<br />
}

Note the double [[]] so you get just the value, not the pair.

This entry was posted on Tuesday, March 16th, 2010 at 10:52 pm and is filed under r, stats. You can follow any comments to this entry through the RSS 2.0 feed. You can leave a comment, or trackback from your own site.

2 comments

  1. Ian Lewis
    January 11, 2011 at 10:45 am

    Thanks for that snippet!

    I was able to write a script that allows me to list the levels associated with each of the named variables.

    Ian

    Reply
  2. Matt
    October 27, 2011 at 4:37 pm

    Very helpful. Better than the usual “LOOPS ARE EVIL!!111111″ instructions. Thanks!

    Reply

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