[求助] 没有错误，变量下游红色波浪线什么意思

Fx=[-212.0225 -141.1817 -103.5818 -127.8721 -168.5082 -206.3204 ];
Fy=[364.1710 178.7049 -16.4193 -72.5504 -58.5814 -37.3701 ];
Fz=[130.9362 82.4401 38.4321 33.9692 45.6100 56.9148];
n=length(Fx);
for k=1:n
Ft(k)=-cos(pi/n*k)*Fx(k)+sin(pi/n*k)*Fy(k);
Fr(k)=-sin(pi/n*k)*Fx(k)-cos(pi/n*k)*Fy(k);
Fa(k)=Fz(k); end