MATLAB: How can i solve this exam practise question

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Best Answer

Since you aren't allowed to use efficient tools (e.g. sort), you are forced to write slow code. I would not try to use eval to cheat here, although I doubt the grader will detect that, especially if you encapsulate it in str2func.

BUT: you are in luck. You were given the task to get the numbers without repitition. The unique function will automatically sort the output for you.

Related Solutions

MATLAB: Inner loop not working

Your code does run. You can use the debugger to check this: Set a breakpoint inside the loop (the red dots on the left), then Matlab stops there at the execution. See Matlab: Debug. Now step through the code line by line and examine the local variables in the WorkSpace-browswer or in the command window.

Because your assumption "only for k=0 and does not run for the rest" is not correct, but you do not explain, why you assume this, it is difficult to suggest an improvement. Without knowing, what the code should calculate, I cannot guess if it contains a bug.

Perhaps "b=0;" should appear inside the loop. "summa(i) = b" should be sufficient, because summa is predefined with zeros.

MATLAB: Memory and mxFree, mxDestroyArray

.....done... Just comment on this, if you like to know more about the issue and have a nice day.

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Answer 1

Since you aren't allowed to use efficient tools (e.g. sort), you are forced to write slow code. I would not try to use eval to cheat here, although I doubt the grader will detect that, especially if you encapsulate it in str2func.

BUT: you are in luck. You were given the task to get the numbers without repitition. The unique function will automatically sort the output for you.