Kernel estimation of a probability density in one dimension
is performed by `density.default`

using a kernel function selected from the list above.

This function computes a scale constant for the kernel.
For the Gaussian kernel, this constant is equal to 1.
Otherwise, the constant \(c\) is such that the kernel
with standard deviation \(1\) is supported on the interval
\([-c,c]\).

For more information about these kernels,
see `density.default`

.