Class: GSL::Matrix

Inherits:
Object
  • Object
show all
Defined in:
lib/gs2crmod/astrogk/gsl_tools.rb,
lib/gs2crmod/gsl_tools.rb

Defined Under Namespace

Classes: Complex

Instance Method Summary collapse

Instance Method Details

#forward_rows_r2cc ⇒ Object 



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# File 'lib/gs2crmod/astrogk/gsl_tools.rb', line 150

def forward_rows_r2cc
	gm = self.dup
	rows, cols = gm.shape
	if cols%2 == 0
		newcols = (cols+2)/2  
	else
		newcols = (cols+1)/2		
	end
	gm_cc = GSL::Matrix::Complex.alloc(rows, newcols)
		
	table = GSL.cache[[:fft_table, :real, cols]] ||= GSL::FFT::RealWavetable.alloc(cols)
	work = GSL.cache[[:fft_work, :real, cols]] ||= GSL::FFT::RealWorkspace.alloc(cols)
	row = GSL::Vector.alloc(cols)
	for i in 0...rows
		(0...cols).each{|j| row[j] = gm[i,j]}
# 		p i
# 		row = gm.get_row(i)
# 		vec_out = GSL::Vector::Complex.alloc(row.size)
# 		(0...row.size).each{|j| vec[j] = row[j]}
# 		if cols%2 == 0
# 			vec_out = vec.concat(vec.subvector(1, vec.size - 2).reverse.conjugate)
# 		else
# 			vec_out = vec.concat(vec.subvector(1, vec.size - 1).reverse.conjugate)
# 		end
		view = row.forward(table, work).halfcomplex_to_complex
		for j in 0...newcols
			gm_cc[i,j] =  view[j]
		end
	end
	return gm_cc
end

#move_cols_from_box_order ⇒ Object 



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# File 'lib/gs2crmod/astrogk/gsl_tools.rb', line 143

def move_cols_from_box_order
	rows, cols = self.shape
	gm1, gm2 = self.view(0,0, rows, (cols + 1)/2), self.view(0, (cols + 1)/2, rows, (cols - 1)/2)
	return gm2.horzcat(gm1)
end

#move_rows_from_box_order ⇒ Object 



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# File 'lib/gs2crmod/astrogk/gsl_tools.rb', line 138

def move_rows_from_box_order
	rows, cols = self.shape
	gm1, gm2 = self.view(0,0, (rows + 1)/2, cols), self.view((rows + 1)/2, 0,  (rows - 1)/2, cols)
	return gm2.vertcat(gm1)
end