function Untitled2
clear;clc;close all
load matlab
eta1=eta1(1:5:end,:);

x=eta1(:,2);
y=eta1(:,1);
% theta=eta1(:,3); % ?

theta=pi/2-eta1(:,3);
figure1=figure('color','w');plot(x,y);hold on;axis equal
myr=linspace(0,0,length(x));
myg=linspace(0,1,length(x));
myb=linspace(0,0,length(x));
for jj=1:length(x)   
    plotSquare2(x(jj),y(jj),theta(jj),1/30,[myr(jj),myg(jj),myb(jj)]);
end
colormap([myr', myg', myb'])
colorbar
saveas(gcf,'untitled2.jpg')


function plotSquare(x0,y0,theta,a,mycolor)
xs=[-2*a,-2*a,2*a,3*a,2*a,-2*a];
ys=[a,-a,-a,0,a,a];

xy=[cos(theta),-sin(theta);
    sin(theta),cos(theta)]*[xs;ys] ;

fill(xy(1,:)+x0,xy(2,:)+y0,mycolor)

5楼: Originally posted by plxh at 2012-04-08 13:44:10:
clear;clc;close all
load matlab3
for i=1:3;
    if i==1   %必须是用两个等号。
            
        eta12=eta1(1:5:end,;

        x=eta12(:,2);
        y=eta12(:,1);
        % theta=eta ...