[R] matrix transpose and object name

[Thomas Lumley]

On Tue, 7 Nov 2000 Pan_Yuming at aam.de wrote:

> hello, everybody,
> 
> i have several unresolved issues:
> 1. how to do a matrix transpose? i cant find how to do it in the
> documentation.

t(matrix).  

This may be a good time to point out the help.search() function.
   help.search(transpose) 
returns
  Help files with name or title matching `transpose':

  t(base)   Matrix Transpose


> 2..suppose i have an object named as lm1 from linear regression, how could
> i refer to it by paste("lm",1,sep="") ?

You could refer to it by get(paste("lm",1,sep="")) but this sort of thing
is very rarely necessary.  

If you have a whole bunch of lms to store then you can put them in a list,
and then refer to them as, say, lmlist[[1]], lmlist[[2]]


> 3. to save a matrix 100 x 30, how to have a text file with 100 lines and 30
> cols, instead of stacking them?

help(write.table)


	-thomas

Thomas Lumley
Assistant Professor, Biostatistics
University of Washington, Seattle

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