[求助]matlab的两道题（分叉与混沌、正交变换问题）

[yuxuanqk]

(3) clear;
w=[2,3,4,5,6,7,8,9,10;4,2,0,2,4,2,0,2,4];
plot(w(1,,w(2,);
hold on;
theta=[pi/4,pi/2,pi,3*pi/2];
color=['r','b','y','k'];
for i=1:4
T=[cos(theta(i)),-sin(theta(i));sin(theta(i)),cos(theta(i))];
w1=T*w;
plot(w1(1,,w1(2,,color(i));
hold on;
end
(4)
笔顺长度指什么？线条的长度？