On Thu, Sep 3, 2009 at 5:50 AM, Peter Meilstrup <peter.meilst...@gmail.com>wrote:
> I'm trying to massage some data from Matlab into R. The matlab file has a > "struct array" which when imported into R using the R.matlab package, > becomes an R list with 3+ dimensions, the first of which corresponds to the > structure fields, with corresponding row names, and the second and third+ > dimensions correspond to the dimensions of the original struct array (as > matlab arrays always have 2+ dimensions). For example a 1x1 matlab struct > array with three fields becomes: > > > data > , , 1 > > [,1] > trials List,1002 > beforeRun List,8 > afterRun List,8 > This doesn't look like a list at all -- rather, it seems like a 3-dimensional array which has lists as its elements. But it seems that the last dimension of your array is not actually used, so can't you do just cbind(data1[,,1], data2[,,1]) ? Or if you really need that empty dimension, use something like array(cbind(data1,data2), dim=c(3,2,1), dimnames=rownames(data1[,,1])) (tried it with abind I just downloaded, and it says this: "Error in abind(x, x2, along = 3, force.array = FALSE) : can only supply one list-valued argument for ...". Maybe it's a recent change) KK > If I load two data files, I would want to concatenate them into a single > list. cbind() doesn't preserve the row names, possibly because the array has > three dimensions? > > > cbind(data1, data2) > data1 data2 > [1,] List,1002 List,479 > [2,] List,8 List,8 > [3,] List,8 List,8 > > Then I looked into abind(), which is even more puzzling: it preserves the > names and dimensions correctly, but converts the entries into strings?! > > > abind(list(data1, data2), along=2, force.array=FALSE) > , , 1 > > [,1] [,2] > trials "0" "1" > beforeRun "2079647.50207592" "0" > afterRun "1" "0" > > Is there a quick way to accomplish the effect I want? I want an output that > looks like: > > > somebind(data1, data2, along=2) > , , 1 > > [,1] [,2] > trials List,1002 List,479 > beforeRun List,8 List,8 > afterRun List,8 List,8 > > Cheers, > Peter > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.
