My assignment is to make my graph look like the figure below, but I having troub

ID: 3536252 • Letter: M

Question

My assignment is to make my graph look like the figure below, but I having trouble making the graph look like this

This is data, you can download it from mediafire: http://www.mediafire.com/?donr0nic4yz4cq3

I current have this much done in Editor:

post_data = dlmread('posdat.txt',' ');

t = post_data(:,1);

x = post_data(:,2);

y = post_data(:,3);

s = post_data(:,4);

submovindex1 = find(570<=x & x<=948);

submovindex2 = find(948<=x & x<=939);

submovindex3 = find(937<=x & x<=536);

submovindex4 = find(536<=x);

figure(1)

plot(x(submovindex1(1)),y(submovindex1(1)),'-ko')

plot(x(submovindex1(end)),y(submovindex1(end)),'-bo')

plot(x(submovindex2(2)),y(submovindex2(2)),'-bo')

plot(x(submovindex2(end)),y(submovindex2(end)),'-ro')

plot(x(submovindex3(3)),y(submovindex3(3)),'-ro')

plot(x(submovindex3(end)),y(submovindex3(end)),'-go')

plot(x(submovindex4(4)),y(submovindex4(4)),'-go')

plot(x(submovindex4(end)),y(submovindex4(end)),'-ko')

xlabel('x (mm)'),ylabel('y (mm)');

axis equal;

grid on;

hold on;

set(gca, 'GridLineStyle','-');

post_data = dlmread('posdat.txt',' '); t = post_data(:,1); x = post_data(:,2); y = post_data(:,3); s = post_data(:,4); submovindex1 = find(570

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