Re: [R] readMat - how to retrieve the variables

From: Joshua Wiley <jwiley.psych_at_gmail.com>
Date: Sun, 13 Mar 2011 14:29:33 -0700

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 <emammendes_at_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
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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>

-- 
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/

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Received on Sun 13 Mar 2011 - 21:32:19 GMT

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