MATLAB: “Error: Unexpected MATLAB expression.” I’m not too sure what’s wrong with the code.

basicinputoutput

Best Answer

You cannot have a space in the name of your m-file. Call it IOHomework.m instead of "IO Homework.m"

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MATLAB: What’s wrong here

There is nothing wrong with that code. Please tell us the entire error message, not a small part of it like you did. What you showed is not a MATLAB error message. How do I know? Well it doesn't have line numbers or function names for one thing. Also tell us the value of i when it errors. With syntax errors, it's possible that the error actually starts on the line before what it says.

MATLAB: What’s the matter!

My guess is you're reusing a variable name, for example

 a = 1;
 a.b = 2;

The warning is letting you know that by assigning a field b to the variable a, you are overwriting the double array a with a structure array named a. If you do initialize the structure first, it will avoid the error.

 a = 1;
 a = struct;
 a.b = 2;

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MATLAB: What’s wrong here

MATLAB: What’s the matter!

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