[R] How to create multi variables

[yuanzhi]

Thank you for your reply.

Yes, there is a problem according to you suggestion.
What if the value are not numerical, e.g. I want to use the variable to
store the results of linear regression.
can I use
myvec <- vector( "numeric", 10 )
for ( i in 1:10 ) {
  myvec[ i ] <- summary(lm(y~x)) # y and x are different values in each
loop.
}
?

you advice seems only to be available when the function left allocates a
numerical value to the variable, what if the function return other type of
objects?




Jeff Newmiller wrote
> What is wrong with
> 
> myvec <- vector( "numeric", 10 )
> for ( i in 1:10 ) {
>   myvec[ i ] <- i
> }
> 
> ?
> 
> If you are using assign, IMHO you are probably doing whatever you are
> doing wrong.
> 
> If you want named elements, give the vector names:
> 
> names( myvec ) <- paste0( "t", 1:10 )
> 
> and you can refer to them
> 
> myvec[ "t3" ]
> 
> Go read the "Introduction to R" document again... particularly the
> discussion of indexing.
> ---------------------------------------------------------------------------
> Jeff Newmiller                        The     .....       .....  Go
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> DCN:<

> jdnewmil at .ca

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> --------------------------------------------------------------------------- 
> Sent from my phone. Please excuse my brevity.
> 
> On May 13, 2014 5:47:12 PM PDT, Yuanzhi Li <

> Yuanzhi.Li@

> > wrote:
>>Hi, everyone
>>
>>I want to create a series of variables (e.g. t1, t2..., t10) which
>>could 
>>be used in loops. My idea is to use function "assign"
>>
>>for (i in 1:10)
>>{
>>   assign(paste("t",i,sep=""), FUN) # allocate the value from FUN to 
>>variable ti
>>}
>>
>>But when I create a vector containing the names of these variables and 
>>want to use the variables according to the subscript, it doesn't works.
>>
>>t<-noquote(paste("t",1:10,sep=""))
>>t[1]
>>t1
>>it returns only the name of variable t1, but not the value allocated to
>>
>>t1 by FUN. So what should I do to realize this?
>>
>>Or is there any better way to do this?
>>
>>Can we define a series of variables which can be used according to the 
>>subscript like
>>t<-f(t1, t2..., t10),
>>then we have 10 variables which can be used directly?
>>for(i in 1:10)
>>{
>>  t[i]<-FUN# with the fines variables we can directly assign the value 
>>of FUN to ti
>>}
>>These are just my thoughts, I don't know whether there are available R 
>>codes to realized it. I am looking forward any help from you.
>>
>>Thanks in advance!
>>
>>Yuanzhi
>>
>>______________________________________________
>>

> R-help@

>  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.
> 
> ______________________________________________

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