MATLAB Answers

index exceeds matrix demension

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PetronasAMG
PetronasAMG 3 Feb 2018
답변: Image Analyst 4 Feb 2018
figure(1)
hold on;
plot(1.25,1.25,'ro');
i=1;
while i <= 20
plot([xi(i),xj(i)],[yi(i),yj(i)],'b');
i= i+1
end
title('graph')
grid;
box;
ax = gca;
ax.YAxisLocation = 'origin';
keep on getting index exceeds matrix demension... could you please help??

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Jan
Jan 4 Feb 2018
Please post the complete error message. Then the readers do not have to guess, where the error occurs. Without your input data, we cannot guess, which variable is affected. But it could even be a redefining of "title" as a variable.
Walter Roberson
Walter Roberson 4 Feb 2018
Note that when i becomes 2, then xi(i) will not refer to a variable named x2: it will continue to refer to a variable xi

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Image Analyst
Image Analyst 4 Feb 2018
Your 4 vectors have a length less than 20. Before the loop put this, and you'll see (in the command window)
size(xi)
size(xj)
size(yi)
size(yj)
Do they all go up to 20? No, evidently not or you wouldn't be getting an error message. If you still need help, attach your xi, xj, yi, and yj.

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