rbfGaussian
Creates a Gaussian radial basis function (RBF) with the given scale parameter. The resulting RBF computes the exponential decay based on the squared distance scaled by the parameter.
Return
A function representing the Gaussian RBF, which takes a square of the distance as input and returns the RBF value.
Parameters
scale
The scale parameter influencing the width of the Gaussian RBF. Smaller values result in a steeper decay.