R help - Jan 2010 - iterative regressions, adding a new line of data each time

Hi, I am pretty new to R. I'm trying run a regression repeatedly, adding a
new data point each time, and then storing the predicted Y values. For
example, let's say I have 500 data points and I run the regression. I would
then like to store the Y value, run the regression again using 501 data
points, store the new Y, run the regression with 502 data points, store the
Y, and so on. What I would like is a new object that has all of the
predicted Y values.  I'm using time series data, and I'm running a
multivariable regression.  Any help would be greatly appreciated.  Thanks.
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On 31/01/2010, at 12:14 PM, ace834 wrote:
> 
> Hi, I am pretty new to R. I'm trying run a regression repeatedly,
adding a
> new data point each time, and then storing the predicted Y values. For
> example, let's say I have 500 data points and I run the regression. I
would
> then like to store the Y value, run the regression again using 501 data
> points, store the new Y, run the regression with 502 data points, store the
> Y, and so on. What I would like is a new object that has all of the
> predicted Y values.  I'm using time series data, and I'm running a
> multivariable regression.  Any help would be greatly appreciated.  Thanks.

This would seem to be very easy to do using a for loop and a list.

What is the problem? Is this a homework question?

	cheers,

		Rolf Turner

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Thank you all for the help, and as a side note I'm not a student, so this
isn't a homework assignement, I'm  just new to R.
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I used rpanel() to do an interactive regression of a time series. My use was
not as involved as yours, but it might give you an idea of how to approach.

Here's a 
http://chartsgraphs.wordpress.com/2009/05/08/rpanel-package-adds-interactive-capabilites-to-r/
link  to my blog post. 
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