def set(index, r, g, b)
			check_index(index)
			self[index] = Color.new(r, g, b)
		end
def set(index, r, g, b)
			check_index(index)
			self[index] = Color.new(r, g, b)
		end
def set ( index , r , g , b ) check_index ( index ) self [ index ] = Color . new ( r , g , b ) end
Set given pixel identified by +index+ to +r+, +g+, +b+

 See <tt>[]=</tt> for a method that takes +Color+ instance instead
 of individual components
Set given pixel identified by + index + to + r + + g + + b +