MATLAB学习：理科生的浪漫二

Posted 2021-06-15 谁曾见过风-

用MATLAB画心跳动态图

gcp=figure;
M=moviein(100,gcp);
heartSpeed=15;
radiusRate=3;

for i = 1:100
    
    axis([-20 20 -20 20]);
    cla(gcp);
    x=[];
    y=[];
    
    for t = 0:0.01:2*pi
        r=(sin(t)*sqrt(abs(cos(t))))/(sin(t)+7/5)-2*sin(t)+2;
        r = radiusRate * r;
        x=[x,r*cos(t)*(0.5+0.5*HeartRate(i,heartSpeed))];
        y=[y,r*sin(t)*(0.5+0.5*HeartRate(i,heartSpeed))];
    end
    hold on;
    fill(x,y,'r');
    
    M(:,i)=getframe;
end
movie(M,1);

HeartRate函数：

function ratio=HeartRate(i,heartSpeed)
i=mod(i,heartSpeed);    % i等于i%heartSpeed
if i < heartSpeed / 2
    ratio=sin( i/heartSpeed*pi);
elseif i >= heartSpeed / 2 && i < heartSpeed * 3/4
    ratio=2*cos(i/heartSpeed*2/3*pi);
else
    ratio = 0;
end