matlab 绘制由下列极坐标方程表示的曲线 r=aθ答:1、theta1=linspace(theta(1),theta(end),5000);yy=spline(theta,R,theta1);polar(theta1,yy)2、theta = [0,15,30,45,60,75,90,105,120,135,150,165,180,195,210,225,240,255,270,285,300,315,330,345,360];R =[320,321,341,375,420,450,460,466,474,468,466,466,466,466,...