turn list into dataframe
On Mon, Oct 8, 2012 at 10:49 PM, Benjamin Caldwell
<btcaldwell at berkeley.edu> wrote:
Dear R users, I'm starting to use 'apply' functions rather than for loops in R, and sometimes the output is a bit different than what I want. In this case, the command was tapply(myvector,myindex,cumsum) And the output was something like this: $`SNRL1 Core 120` [1] 2.8546 4.0778 5.2983 6.3863 7.5141 8.5498 9.5839 10.6933 $`SNRL1 Core 230` [1] 7.6810 8.7648 9.8382 10.8903 11.9840 13.0541 14.1132 15.1657 $`VAL 1.1.NA.na30` [1] 22.0840 30.3001 35.2505 42.8085 48.5220 52.0604 57.9428 61.4930 64.4550 67.3543 69.8435 72.9508 74.4730 76.3104 $`VAL 1.2.NA.na15` [1] 33.8895 38.7440 41.0536 44.1581 46.4891 48.3130 51.0973 52.9241 54.6404 56.1265 57.5064 59.0745 $`VAL 1.2.NA.na30` [1] 6.6408 10.6838 13.8328 15.5435 18.3037 20.3315 22.8817 24.4481 26.4106 27.6658 29.6455 30.8490 31.8680 $`VAL 1.3.NA.na10` [1] 4.8198 7.1274 8.9536 11.5954 14.0845 15.5116 16.9462 18.1269 19.3453 20.5723 21.7122 22.8643 $`VAL 1.3.NA.na20` [1] 5.7382 8.2056 9.4489 10.8225 12.3497 13.6879 15.1077 16.3229 , That's fine, but I need the output as a dataframe. I'm not even sure what to call this list, but it has multiple entries for each item. Forgive the fact that I don't have the data for you to use, I'm wondering if anyone knows about a pre-existing function that will allow be to turn the above list form into a dataframe. Thanks *Ben Caldwell*
Hi Ben, In the future, you can get some good advice for making reproducible examples here: http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example In your case, I think something like do.call(data.frame, LIST) will work. Take a look at ?do.call for an explanation of the magic. Cheers, Michael