MATLAB中单摆怎么保存成gif格式的

参考自：MATLAB CENTRAL - How can I create animated GIF images in MATLAB ?

将那个循环的代码改成：

outfile = 'x.gif';
for t = 0:.1:2*pi
    theta=theta0*cos(sqrt(g/l)*t);    
    x=l*sin(theta);    
    y=(-1)*l*cos(theta);    
    set(head,'xdata',x,'ydata',y);    
    set(body,'xdata',[0;x],'ydata',[0;y]);    
    % drawnow
    
    frame = getframe(1);
    im = frame2im(frame);
    [imind,cm] = rgb2ind(im, 256);
    if t == 0
        imwrite(imind,cm,outfile,'gif','DelayTime',0,'loopcount',inf);
    else
        imwrite(imind,cm,outfile,'gif','DelayTime',0,'writemode','append');
    end
end