Class: GSL::GaussianSmoothKernel

Inherits:
Vector
  • Object
show all
Defined in:
lib/gsl_extras.rb

Constant Summary collapse

KERNELS = 
{}

Class Method Summary collapse

Methods inherited from Vector

#_dump, _load, #gaussian_smooth, #gaussian_smooth!, #inspect, #join, #mean_no_outliers, #rectangular_smooth, #to_gslv

Class Method Details

.alloc(sigma, delt = 1.0) ⇒ Object 



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# File 'lib/gsl_extras.rb', line 1068

def self.alloc(sigma, delt = 1.0)
	return KERNELS[[sigma,delt]] if KERNELS[[sigma,delt]]
	npix ||= (3.0*sigma / delt).floor
	kernel = super(2*npix + 1)
	for i in 0...kernel.size
		j = (i - npix) * delt
		kernel[i] = Math.exp(- j**2 / 2.0 / sigma**2) / ( 2.0 * Math::PI * sigma**2)
	end
	KERNELS[[sigma,delt]] = kernel / kernel.sum
end