Variables inside a for
?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
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