æ³ç·ã n := (θ, Ï) = [sinθcosÏ sinθsinÏ cosθ]⤠ã®å¤§åããã©ã¡ã¿å½¢å¼ã§è¡¨ãã¨, R(θ, Ï) [cos(t) sin(t) 0]⤠ãã, [x] [ cos(θ)cos(Ï)cos(t)âsin(θ)sin(t) ] [y]=[ cos(θ)sin(Ï)cos(t)+cos(Ï)sin(t) ] [z] [âsin(θ)cos(t) ] Gnuplot ã§æç»ããä¾ set para th=pi/4 # 天é è§ ph=pi/9 # æ¹ä½è§ set arrow to sin(th)*cos(ph), sin(th)*sin(ph), cos(th) # æ³ç·ãã¯ãã« splot [0 to 2*pi] cos(th)*cos(ph)*cos(u)-sin(ph)*sin(u), \ cos(th)*sin(ph)*cos(u)+cos(ph)*si
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