To further the understanding of the loess fit and how the tricube weight
work you may want to look at the loess.demo function in the TeachingDemos
package. It will create a scatterplot of the data and show the loess fit,
then when you click on the plot it will show the weights used for
predicting
Thank you Mr Snow. I will look into it.
Best regards
Joyce Lin
On 11 Jan, 2013, at 3:55 AM, Greg Snow 538...@gmail.com wrote:
To further the understanding of the loess fit and how the tricube weight work
you may want to look at the loess.demo function in the TeachingDemos package.
It
Thank you Mr Gunter! I will look into it.
On Wed, Jan 9, 2013 at 11:59 AM, Bert Gunter gunter.ber...@gene.com wrote:
As this does not seem to have been answered...
I believe you may misunderstand how loess works. The tricube weights
are part of the smoothing algorithm and change with each
Hi
I am trying to get the tricube weights from the loess outputs as I need to
calculate an error function which requires the weight.
So I have used the following example from the R:
cars.lo - loess(dist ~ speed, cars, span=0.5, degree=1, family=symmetric)
Then i try to get the weights:
As this does not seem to have been answered...
I believe you may misunderstand how loess works. The tricube weights
are part of the smoothing algorithm and change with each local fit,
not fixed weights for observations, which is what the weights
argument provides (and initially multiplies the
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