[R] line up a matrix

[Tord Snall]

Dear Douglas Bates, Winfried Theis and Andy Liaw,

Thanks for your quick replies! All alternatives worked well of course.

One can keep on trying simple things for hours as a beginner (if you
happened to have forgotten...).


Tord Snäll





At 07:59 2002-01-04 -0600, you wrote:
>Tord Snall <tord.snall at ebc.uu.se> writes:
>
>> Dear all,
>> 
>> I try to rearrange my ref. database (now in Excel!! :(  ) for importing it
>> into a reference manager program (RIS format). 
>> 
>> My file basically look like this [3,4]-matrix:
>> 
>> rbind(c("a", "b", "c", "d"), c("e", "f", "g", "h"), c("i", "j", "k", "l"))
>>      [,1] [,2] [,3] [,4]
>> [1,] "a"  "b"  "c"  "d" 
>> [2,] "e"  "f"  "g"  "h" 
>> [3,] "i"  "j"  "k"  "l" 
>> 
>> and I have tried to find a function to line up the matrix into a vector
>> which I would like to look like this:
>> 
>> t(c("a", "b", "c", "d","e", "f", "g", "h","i", "j", "k", "l"))
>> 
>> Is there any R function for available for that?
>
>In R matrices are stored in column major order so you want to transpose
>your matrix and convert it to a vector.  One way is
>
> as.vector(t(mat))
>
>Interestingly using 
> 
> c(t(mat))
>
>which is almost symmetric with your t(c("a", ...)), would do the same
>thing.
>
>
>

-----------------------------------------------------------------------
Tord Snäll
Avd. f växtekologi, Evolutionsbiologiskt centrum, Uppsala universitet
Dept. of Plant Ecology, Evolutionary Biology Centre, Uppsala University
Villavägen 14			
SE-752 36 Uppsala, Sweden
Tel: 018-471 28 82 (int +46 18 471 28 82) (work)
Tel: 018-25 71 33 (int +46 18 25 71 33) (home)
Fax: 018-55 34 19 (int +46 18 55 34 19) (work)
E-mail: Tord.Snall at ebc.uu.se
http://www.vaxtbio.uu.se/resfold/snall.htm
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