Hallo Peter,

thank you. It is exact what I wanted. Now I can modify my program.

Corinna
  

________________________________

Von: Peter Konings [mailto:peter.l.e.konings@gmail.com] 
Gesendet: Dienstag, 24. April 2007 10:55
An: Schmitt, Corinna
Betreff: Re: [R] information extraction



Hi Corinna,

names() is what you are looking for, e.g.

names(data)
names(data)[10]
names(data) <- a.vector.of.my.own.names

BTW, data() is a function in R, so it's better to avoid it as the name
of a dataframe. 
for more information, see the documentation installed with R or one of
the contributed documents at 

http://cran.r-project.org/other-docs.html

in particular the "R and octave" document will be relevant to you as a
matlab user. 

HTH
Peter.

On 4/24/07, Schmitt, Corinna <Corinna.Schmitt@igb.fraunhofer.de> wrote: 

Dear R-experts,

I imported successful a workspace from Matlab. The information is stored
in the variable data. If I use the command "length(data)" I get back a
number which corresponds to the number of variables which were imported.

Here it is 82. Now I only want to know the names of the imported
variables to modify my program. Can anyone help me?

My knowledge which I tested yet to archive the goal:

1. I know that I can extract the information of a variable with the 
command "data$staine" for example. Here I need to know the variable name
"staine" coming from Matlab. But what if I do not know it?

2. The command "data[10]" just gives me back the information stored in 
the variable no. 10  but I do not know the name.

3. I am not allowed to make changes in the Matlab code because it just a
lizenced program so I need to do it in R. In Matlab I just need to add
the code line "names=evalin('base','who')" and than store the workspace.

I could use the variable name in and extract the names with data$names.


Has anyone an idea?

Thanks, Corinna

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