Re: [R] Fit values for NA's in linear regression

From: Spencer Graves <spencer.graves_at_pdf.com>
Date: Sat 18 Jun 2005 - 01:48:51 EST

          Have you considered:

 > set.seed(1)
 > tstDF <- data.frame(x=1:4, y=c(NA, 2:4+rnorm(3)))
 > fit <- lm(y~x, tstDF)
 > predict(fit)
        2        3        4

1.678441 2.573854 3.469266
 > predict(fit, tstDF)

         1 2 3 4 0.7830284 1.6784410 2.5738536 3.4692662

          spencer graves

Luca Wacker wrote:

> Hi,
>
> To obtain estimates for some missing values in my data I fitted a
> linear regression and then used the command fitted(model) to get the
> fitted values from the model, but R doesn't return any values for the
> NA's. I can calculate the fitted values from the estimates obtained
> from the summary of model, but that's not very handy. Is there a way to
> include the missing values in the analysis and get fitted values for
> the NA's? I tried to use with the function na.action, but that didn't
> work.
>
>
> thanks
>
> Luca
>
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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Jun 18 03:36:41 2005

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