Re: [R] lm: how to calculate rsquared of the predicted values?

From: Max Kuhn <mxkuhn_at_gmail.com>
Date: Sat, 8 Dec 2007 12:38:01 -0500

>
> 1. can I measure de R-squared value between the predicted(by the model) and
> real (observed) values.?
> 2. Measure the RMSE error .
>

There is a function in the caret package called postResample that will do that (even if you aren't using resampling).

As has been previously noted on this list, there are a number of formulas for R-squared. This function uses the square of the correlation between the observed and predicted. The next version of caret will offer a choice of formulas.

-- 

Max

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Received on Sat 08 Dec 2007 - 17:43:53 GMT

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