MATLAB: How to resolve index exceeding error while I plot something

index exceeding errorplottitle

Hello all, I'm keep having error when I tried to put title on my plot. The error message said "Index exceeds matrix dimensions." Here's my code, so please let me know why I got this message. Thanks!

figure
title('2')
h = plot(dataCenter(:,1),dataCenter(:,2),'Color','b')

Best Answer

The error message is clear: An indexing operation in this line exceeds the defined array sizes:

h = plot(dataCenter(:,1),dataCenter(:,2),'Color','b')

Either dataCenter has 1 column only, or you have redefined plot by an array and the inputs are interpreted as indices. You can check both by using the debugger. Type this in the command window:

dbstop if error

Now run the code again until it stops at the problem. Now examine, what's going on:

size(dataCenter)
which plot -all

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MATLAB: How to make a permanent change to a matrix using sortrows

 P = sortrows(P,7) ;

Most of the time functions don't operate "externally", so SORTROWS doesn't alter your array P defined in the workspace. It creates a new sorted array that it outputs. You have to store this output back into P if you want P to be the sorted version. If you wanted to keep the original, you could store it into a new variable:

 P_sorted = sortrows(P,7) ;

MATLAB: Index exceeds matrix dimensions

Type

dbstop if error

before you run your code, and it should halt at this line when the error message is thrown. Then you can look at the values of your variables. Presumably, the value of i is such that it is trying to access an element of the variable GREEN that is beyond the bounds of the array.

Best Answer

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MATLAB: How to make a permanent change to a matrix using sortrows

MATLAB: Index exceeds matrix dimensions

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