如何在R中执行加权的2d内核密度估计？

Question

I would like to produce a kernel density estimation in R, and am somewhat bamboozled by all the different packages. I need to be able to:

1. Specify weights
2. Specify bandwidth size
3. Specify bin size

How would you go about this? Bonus points for a code snippet.

Answer 1

Off course there's a number of packages. You should first decide which 2D kernel estimate you want. In the fields package you have a function smooth.2d, and you have the wonderful package of Brian Ripley, KernSmooth. The extra points for the code snippets you can give to the help files, I ain't going to copy them.

For these kind of questions, also try www.rseek.org .

Answer 2

另请参阅ks程序包和多变量内核密度估计中的精美图片。