[R] predict.lm with NAs

Wincent ronggui.huang at gmail.com
Thu Apr 15 03:20:05 CEST 2010

see ?na.exclude

you can set na.action='na.exclude' when fit the model.

On 15 April 2010 09:06, Martin Batholdy <batholdy at googlemail.com> wrote:
> Hi,
> I wanted to use the predict.lm() function to compare the empirical data with the predicted values.
> The problem is that I have NAs in my data.
> I wanted to cbind my data.frame with the empirical values with the vector I get from predict.lm.
> But they don't have the same length because predict.lm just skip NA-predictions.
> Is there a way to get a vector with predicted values of the same length as the empirical values (with NAs)?
> thanks!
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Wincent Rong-gui HUANG
Doctoral Candidate
Dept of Public and Social Administration
City University of Hong Kong

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