Hi there ... means that I have not copied all the data that R showed on the screen.
Cheers Ed -----Original Message----- From: David Winsemius [mailto:dwinsem...@comcast.net] Sent: Sunday, March 13, 2011 8:37 PM To: Eduardo M. A. M.Mendes Cc: 'Joshua Wiley'; R-help@r-project.org Subject: Re: [R] readMat - how to retrieve the variables On Mar 13, 2011, at 7:27 PM, Eduardo M. A. M.Mendes wrote: > Hello there > > Here is the output of the command > > structure(list(a = > structure(list(structure(list(structure(c(16.259746877453, > 17.7125316239611, 17.7801266531401, 18.7370886410339, > 18.5622784910323, 19. .... That seems pretty unlikely. All of those "...." are not in the output from dput are they? The dimension of 3683 implies otherwise. > .... > ), .Dim = c(3683L, 1L)), structure(c(0, 0, 6.7, 46.1, 2, 0, 29.5, > 93.7, 4.5, 39.6, 1.4, 5.5, 9, 12.2, 5.7, 0, 0, 0, 0, 8, 0, 19.5, > 30 .... > .... > ), .Dim = c(3683L, 1L))), .Dim = c(2L, 1L, 1L), .Dimnames = list( > c("flow", "precip"), NULL, NULL)), structure(list(structure(c(42, > 42, 44, 60, 84, 97, 113, 357, 613, 495, 401, 295, 250, 228, 202, > 174 .... > .... > 12, 36, 0, 2, 0, 6, 13, 0, 1, 0, 12, 0, 0, 32, 0, 0, 1, 36, 7, 36, 48, > 27, 7), .Dim = c(3683L, 1L))), .Dim = c(2L, 1L, 1L), .Dimnames = list( > c("flow", "precip"), NULL, NULL))), .Dim = c(2L, 1L, 1L), .Dimnames > = list( > c("river1", "river2"), NULL, NULL))), .Names = "a", header = > structure(list( > description = "MATLAB 5.0 MAT-file, Platform: PCWIN, Created on: > Sun Mar > 13 18:51:54 2011 ", > version = "5", endian = "little"), .Names = c("description", > "version", "endian"))) > > Cheers > > Ed > > > -----Original Message----- > From: David Winsemius [mailto:dwinsem...@comcast.net] > Sent: Sunday, March 13, 2011 8:01 PM > To: Eduardo M. A. M.Mendes > Cc: 'Joshua Wiley'; R-help@r-project.org > Subject: Re: [R] readMat - how to retrieve the variables > > > On Mar 13, 2011, at 6:42 PM, Eduardo M. A. M.Mendes wrote: > >> >> Hi Joshua >> >> Many thanks. >> >> The values of flow can be accessed in a weird way and we can used >> them for some calculations. Since I am a newbie as far as using R is >> concerned I wonder whether you could tell me how to create a >> structure in R that looks like the one I have in matlab (that is, a >> variable a that contains river1 and river2 that contains flow and >> precipitation). > > If you posted the results of dput(a) , we might be able to test our > pet theories, but here is my hapless first guess: > > mat.R.struc <- with(b$a[,,1], #looks like it was a matrix that had > lists as elements > cbind(as.data.frame(river1), as.data.frame(river2) ) > ) > > It's not so much that it will "look like" your Matlab structure, but > it could be something that you can work with. This will create a long- > format structure which is a typical one for plotting ans regression. > Another option would be an R array which, unlike matrices, can have > more than 2 dimensions. > > >> >> Cheers >> >> Ed >> >> >> -----Original Message----- >> From: Joshua Wiley [mailto:jwiley.ps...@gmail.com] >> Sent: Sunday, March 13, 2011 7:20 PM >> To: Eduardo M. A. M.Mendes >> Cc: R-help@r-project.org >> Subject: Re: [R] readMat - how to retrieve the variables >> >> On Sun, Mar 13, 2011 at 2:56 PM, Eduardo M. A. M.Mendes >> <emammen...@gmail.com >>> wrote: >>> Hi Joshua >>> >>> Many thanks for the prompt reply. >>> >>> I have saved a short version of the matlab file and the output on R >>> is >>> >>>> b=readMat("testr.mat") >>>> b >>> $a >>> , , 1 >>> >>> [,1] >>> river1 List,2 >>> river2 List,2 >> >> It looks like you are dealing with a special series of lists nested >> within three dimensional arrays within lists. My suggestion would be >> to double check that the matlab file has reasonable data (whatever >> that means) and try to double check your use of readmat (do you meet >> all the requirements for versions, etc.). That is not a common R >> structure so the extraction is similarly uncommon. >> Perhaps Henrik will be along with more helpful answers. >> >> Good luck, >> >> Josh >>> >>> >>> attr(,"header") >>> attr(,"header")$description >>> [1] "MATLAB 5.0 MAT-file, Platform: PCWIN, Created on: Sun Mar 13 >>> 18:51:54 2011 " >>> >>> attr(,"header")$version >>> [1] "5" >>> >>> attr(,"header")$endian >>> [1] "little" >>> >>> When I issue the command b$a[,,1]$river1[,,1]$flow I see the flow >>> values. >>> >>> Unfortunately the data is confidential. >>> >>> Many thanks >>> >>> Ed >>> >>> >>> -----Original Message----- >>> From: Joshua Wiley [mailto:jwiley.ps...@gmail.com] >>> Sent: Sunday, March 13, 2011 6:30 PM >>> To: Eduardo M. A. M.Mendes >>> Cc: R-help@r-project.org >>> Subject: Re: [R] readMat - how to retrieve the variables >>> >>> Hi Ed, >>> >>> Can you please provide *at least* the R output from running: >>> >>> str(data) >>> >>> where "data" is the variable name you stored the results of >>> readMat() in. If it is reasonably small and can be sent as >>> plaintext (I do not know Matlabs file format off hand), you could >>> send us the actual data so we can try to read it in, but at the >>> least str() will let us see how R is storing your data and give you >>> some explanation. >>> >>> Side note, as data() is a function, it might be worthwhile to call >>> your actual data something else (say, mydata, dat, etc.). For >>> anyone else interested, readMat() is in package "R.matlab". >>> >>> Cheers, >>> >>> Josh >>> >>> On Sun, Mar 13, 2011 at 2:07 PM, Eduardo M. A. M.Mendes >>> <emammen...@gmail.com >>>> wrote: >>>> Hello >>>> >>>> I have a matlab MAT file that contains one single variable: a. The >>>> structure of a is as follows: >>>> >>>> a.river1.flow (flow values) >>>> a.river1.date_flow (date) >>>> a.river1.precip (precipitation values) a.river1.date_precip >>>> a.river2.flow a.river2.date_flow a.river2.precip >>>> a.river2.date_precip >>>> >>>> I have used readMat to load the variable a in R, however I have no >>>> idea how readMat translates a. I managed to get some values out of >>>> data=readMat("matfile.mat") >>>> >>>> data$a[,,1]$river1[,,1]$flow -> Why do I need [,,1]? Why not >>>> data$a$river1$flow? >>>> >>>> Many thanks >>>> >>>> Ed >>>> >>>> ______________________________________________ >>>> 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. >> >> -- >> Joshua Wiley >> Ph.D. Student, Health Psychology >> University of California, Los Angeles http://www.joshuawiley.com/ >> >> ______________________________________________ >> 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. > > David Winsemius, MD > West Hartford, CT > > David Winsemius, MD West Hartford, CT ______________________________________________ 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.
