So sorry but the data is confidential. Cheers
Ed -----Original Message----- From: David Winsemius [mailto:dwinsem...@comcast.net] Sent: Sunday, March 13, 2011 9:16 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 7:48 PM, Eduardo M. A. M.Mendes wrote: > Hi there > > ... means that I have not copied all the data that R showed on the > screen. I fail to see the point in posting mangled dput output. -- David. > > 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 > > 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.
