[R] Variables inside a for

[David Winsemius]

?as.formula

copied from the help file:

## Create a formula for a model with a large number of variables:
xnam <- paste("x", 1:25, sep="")
(fmla <- as.formula(paste("y ~ ", paste(xnam, collapse= "+"))))
--  
David Winsemius

On Dec 1, 2008, at 7:45 PM, Raphael Saldanha wrote:

> Hi!
>
> I had a database with some variables in sequence. Let me say: TX01,  
> TX02,
> TX03 and TX04.
>
> But I need to run some regressions changing the variables... so:
>
> variable <- paste("TX0", 1:4, sep="")
>
> for(i in 1:4){
> test[i] <- lm(variable[i] ~ INCOME, data=database)
> }
>
> But doesn't work... lm tries to find a variable inside database named
> variable[i] ...
>
> Suggestions?
>
>
> King regards!
>
> Raphael Saldanha
> Brasil
>
> 	[[alternative HTML version deleted]]
>
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