Re: [R] t.test() on a list
Thanks a lot, Petr! This works perfect! myList was actually a list of data.frame, and the command line initially choked. But once I converted it to matrix, it worked like a charm: apply(do.call(rbind, lapply(lapply(myList, as.matrix), c)), 2, t.test) Thanks, Gang On Mon, Oct 6, 2008 at 9:42 AM, Petr PIKAL <[EMAIL PROTECTED]> wrote: > Hi > > maybe not an answer you like but > > apply(do.call(rbind, lapply(myList, c)), 2, t.test) > > shall give you desired results > > Regards > Petr > > > [EMAIL PROTECTED] napsal dne 02.10.2008 23:25:23: > >> I appreciate your suggestion. The example I provided was fabricated >> because I was only focusing on the programming perspective on how to >> deal with such a data structure, not real statistical issues. Do you >> mind elaborating a little more why that would not be appreciate? I >> know I can do it with a couple of loops, but I still appreciate >> suggestions on how to write a line or two to run t-tests on such a >> data structure. >> >> Thanks, >> Gang >> >> >> On Thu, Oct 2, 2008 at 5:11 PM, Bert Gunter <[EMAIL PROTECTED]> > wrote: >> > I am sure you will get helpful answers. I am almost as sure that you >> > shouldn't be doing this. I suggest you consult with your local > statistician. >> > >> > -- Bert Gunter >> > >> > -Original Message- >> > From: [EMAIL PROTECTED] [ > mailto:[EMAIL PROTECTED] On >> > Behalf Of Gang Chen >> > Sent: Thursday, October 02, 2008 11:24 AM >> > To: [EMAIL PROTECTED] >> > Subject: [R] t.test() on a list >> > >> > I have a list, myList, with each of its 9 components being a 15X15 >> > matrix. I want to run a t-test across the list for each component in >> > the matrix. For example, the first t-test is on myList[[1]][1, 1], >> > myList[[2]][1, 1], ..., myList[[9]][1, 1]; and there are totally 15X15 >> > t-tests. How can I run these t-tests in a simple way? >> > >> > TIA, >> > Gang __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] t.test() on a list
Hi maybe not an answer you like but apply(do.call(rbind, lapply(myList, c)), 2, t.test) shall give you desired results Regards Petr [EMAIL PROTECTED] napsal dne 02.10.2008 23:25:23: > I appreciate your suggestion. The example I provided was fabricated > because I was only focusing on the programming perspective on how to > deal with such a data structure, not real statistical issues. Do you > mind elaborating a little more why that would not be appreciate? I > know I can do it with a couple of loops, but I still appreciate > suggestions on how to write a line or two to run t-tests on such a > data structure. > > Thanks, > Gang > > > On Thu, Oct 2, 2008 at 5:11 PM, Bert Gunter <[EMAIL PROTECTED]> wrote: > > I am sure you will get helpful answers. I am almost as sure that you > > shouldn't be doing this. I suggest you consult with your local statistician. > > > > -- Bert Gunter > > > > -Original Message- > > From: [EMAIL PROTECTED] [ mailto:[EMAIL PROTECTED] On > > Behalf Of Gang Chen > > Sent: Thursday, October 02, 2008 11:24 AM > > To: [EMAIL PROTECTED] > > Subject: [R] t.test() on a list > > > > I have a list, myList, with each of its 9 components being a 15X15 > > matrix. I want to run a t-test across the list for each component in > > the matrix. For example, the first t-test is on myList[[1]][1, 1], > > myList[[2]][1, 1], ..., myList[[9]][1, 1]; and there are totally 15X15 > > t-tests. How can I run these t-tests in a simple way? > > > > TIA, > > Gang > > __ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] t.test() on a list
I appreciate your suggestion. The example I provided was fabricated because I was only focusing on the programming perspective on how to deal with such a data structure, not real statistical issues. Do you mind elaborating a little more why that would not be appreciate? I know I can do it with a couple of loops, but I still appreciate suggestions on how to write a line or two to run t-tests on such a data structure. Thanks, Gang On Thu, Oct 2, 2008 at 5:11 PM, Bert Gunter <[EMAIL PROTECTED]> wrote: > I am sure you will get helpful answers. I am almost as sure that you > shouldn't be doing this. I suggest you consult with your local statistician. > > -- Bert Gunter > > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Gang Chen > Sent: Thursday, October 02, 2008 11:24 AM > To: [EMAIL PROTECTED] > Subject: [R] t.test() on a list > > I have a list, myList, with each of its 9 components being a 15X15 > matrix. I want to run a t-test across the list for each component in > the matrix. For example, the first t-test is on myList[[1]][1, 1], > myList[[2]][1, 1], ..., myList[[9]][1, 1]; and there are totally 15X15 > t-tests. How can I run these t-tests in a simple way? > > TIA, > Gang __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] t.test() on a list
I am sure you will get helpful answers. I am almost as sure that you shouldn't be doing this. I suggest you consult with your local statistician. -- Bert Gunter -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gang Chen Sent: Thursday, October 02, 2008 11:24 AM To: [EMAIL PROTECTED] Subject: [R] t.test() on a list I have a list, myList, with each of its 9 components being a 15X15 matrix. I want to run a t-test across the list for each component in the matrix. For example, the first t-test is on myList[[1]][1, 1], myList[[2]][1, 1], ..., myList[[9]][1, 1]; and there are totally 15X15 t-tests. How can I run these t-tests in a simple way? TIA, Gang __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
