Re: [R] Finding local maxima on a loess surface

On May 4, 2012, at 3:00 PM, Diego Rojas wrote: Thanks, I know about it but i wat to find several local maxima, so in other words I need a way to identify the places in the surface where both slopes are equal to 0 and the second derivative is negative. There is no way that I know that

[R] Finding local maxima on a loess surface

If a run a LOESS model and then produce a smoothed surface: Is there any way to determine the coordinates of the local maxima on the surface? [[alternative HTML version deleted]] __ R-help@r-project.org mailing list

Re: [R] Finding local maxima on a loess surface

On May 3, 2012, at 6:09 PM, Diego Rojas wrote: If a run a LOESS model and then produce a smoothed surface: Is there any way to determine the coordinates of the local maxima on the surface? ?predict# it has a loess method. [[alternative HTML version deleted]] -- David

Re: [R] Finding local maxima on a loess surface

Thanks, I know about it but i wat to find several local maxima, so in other words I need a way to identify the places in the surface where both slopes are equal to 0 and the second derivative is negative. On Fri, May 4, 2012 at 9:28 AM, David Winsemius dwinsem...@comcast.netwrote: On May 3,