## Friday, April 26, 2013

## Thursday, March 14, 2013

### Apply-style commands in R

Here's a quick table of what I think are the most useful apply-style commands in R:

For alternatives to plyr, see this post on StackOverflow.

Function | Input | Output | Best for |

apply | Rectangular | Rectangular or vector | Applying function to rows or columns |

lapply | Anything | List | Non-trivial operations on almost any data type |

sapply | Anything | Simplified (if possible) or list | Same as lapply, but with simplified output |

plyr::ddply | data.frame | data.frame | Applying function to groupings defined by variables |

## Saturday, February 2, 2013

### R scripts for analyzing survey data

Another site pops up with open code for analyzing public survey data:
http://www.asdfree.com/
It will be interesting to see whether this gets used by the general public--given the growing trend of data journalism and so forth--versus academics. It is a useful resource for both.

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