Error using input Not enough input arguments matlab

Error using input Not enough input arguments matlab弄了半天都改不好,这是我源代码clearx=0:pi/18:pi*71/36;r1=zeros(1,36);r2=zeros(1,36);r3=zeros(1,36);disp('请依次输入θ=0°时的光强');for i=0;35;fprintf('φ=%d0°时：',i);r1(i+1)=input; enddisp('请依次输入θ=20°时的光强');for z=0;35;fprintf('φ=%d0°时：',i);r2(i+1)=input;enddisp('请依次输入θ=45°时的光强');for z=0;35;fprintf('φ=%d0°时：',i);r3(i+1)=input;endpolar(x,r1,'r');hold onpolar(x,r2,'g');hold onpolar(x,r3,'b')legend('θ=0°','θ=20°','θ=45°')错误信息>> physics1请依次输入θ=0°时的光强φ=00°时：Error using inputNot enough input arguments.Error in physics1 (line 9)r1(i+1)=input;