[R] R and Matlab

[Thomas Levine]

Is there a particular reason you can't use csv?

write.csv() in R

It seems that you can read csv in Matlab with this
http://www.mathworks.com/help/techdoc/ref/importdata.html

Tom

2010/10/28 Claudia Beleites <cbeleites at units.it>:
>> I am looking for ways to use R and Matlab. Doing the data transformations
>> in
>> R and using the data in Matlab to analyze with some pre-defined scripts.
>> Any good ways to transfer the data into matlab in its most recent version?
>> I tried using R.matlab but the writeMat output is not readable by Matlab.
>
> It used to work, but I didn't need it for quite a while (a year or so ago,
> and with Matlab either 2007 or 2008a).
>
> I just tried, and neither does it work for me.
> You should notify the maintainer of R.matlab and include an example (code
> and data, e.g. with dput).
>
> I noticed that library (R.matlab) does not load the Rcompression package,
> but also after library (Rcompression), the resulting file was not read by
> Matlab.
>
> I tried loading a saved data.frame in Matlab 2008b on an Win XP computer: it
> doesn't find any variables inside the .mat file (and whos -file ...) doesn't
> show a variable.
>
> The other way round with a stupid little vector it worked.
>
> An R session (with only the 2nd try, after library (Rcompression)) is
> attached below.
>
>
>> I just need to output a data.frame and read it as is into matlab where I
>> can
>> do any needed transformations on the variables.
>
> If you need to transfer the data right NOW, there's always csv.
>
> Claudia
>
> ********************
>
>> library (hyperSpec)
> Loading required package: lattice
> Package hyperSpec, version 0.95
>
> To get started, try
>   vignette ("introduction", package = "hyperSpec")
>   package?hyperSpec
>   vignette (package = "hyperSpec")
>
> If you use this package please cite it appropriately.
>   citation("hyperSpec")
> will give you the correct reference.
>
> The project is hosted on http://r-forge.r-project.org/projects/hyperspec/
>
>> sessionInfo ()
> R version 2.12.0 (2010-10-15)
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> locale:
>  [1] LC_CTYPE=en_US.utf8       LC_NUMERIC=C              LC_TIME=en_US.utf8
>  [4] LC_COLLATE=en_US.utf8     LC_MONETARY=C
> LC_MESSAGES=en_US.utf8
>  [7] LC_PAPER=en_US.utf8       LC_NAME=C                 LC_ADDRESS=C
> [10] LC_TELEPHONE=C            LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> other attached packages:
> [1] hyperSpec_0.95    lattice_0.19-13   R.matlab_1.3.3    R.oo_1.7.4
> R.methodsS3_1.2.1
>
> loaded via a namespace (and not attached):
> [1] grid_2.12.0
>> library (Rcompression)
>> x = flu[[]]
>> writeMat ("flu.mat", flu)
> Error in dim(x) <- length(x) : invalid first argument
>> writeMat ("flu.mat", x)
>> sessionInfo ()
> R version 2.12.0 (2010-10-15)
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> locale:
>  [1] LC_CTYPE=en_US.utf8       LC_NUMERIC=C              LC_TIME=en_US.utf8
>  [4] LC_COLLATE=en_US.utf8     LC_MONETARY=C
> LC_MESSAGES=en_US.utf8
>  [7] LC_PAPER=en_US.utf8       LC_NAME=C                 LC_ADDRESS=C
> [10] LC_TELEPHONE=C            LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> other attached packages:
> [1] Rcompression_0.8-0 hyperSpec_0.95     lattice_0.19-13    R.matlab_1.3.3
> R.oo_1.7.4
> [6] R.methodsS3_1.2.1
>
> loaded via a namespace (and not attached):
> [1] grid_2.12.0
>
>
>
> --
> Claudia Beleites
> Dipartimento dei Materiali e delle Risorse Naturali
> Università degli Studi di Trieste
> Via Alfonso Valerio 6/a
> I-34127 Trieste
>
> phone: +39 0 40 5 58-37 68
> email: cbeleites at units.it
>
> ______________________________________________
> R-help at 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.
>