Print Message of Warnings and Errors Detected by Code Analyzer on the Command Window Using MATLAB checkcode Function
Jul. 21, 2025 • Updated Aug. 06, 2025
In MATLAB, Code Analyzer prompts some warnings and errors of current file when editing, for example, for the built-in example file lengthofline.m:
Actually, we can use checkcode function1 to print all of them (but without details and suggestions) on the Command Window:
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checkcode("lengthofline")
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L 21 (C 1-9): Value assigned to variable might be unused.
L 22 (C 12-15): NUMEL(x) is usually faster than PROD(SIZE(x)).
L 23 (C 5-11): Variable appears to change size on every loop iteration. Consider preallocating for speed.
L 23 (C 44-49): Use STRCMPI(str1,str2) instead of using UPPER/LOWER in a call to STRCMP.
L 27 (C 12-15): NUMEL(x) is usually faster than PROD(SIZE(x)).
L 33 (C 13-16): Variable appears to change size on every loop iteration. Consider preallocating for speed.
L 33 (C 24-31): Use dynamic fieldnames with structures instead of GETFIELD.
L 42 (C 13-15): Variable appears to change size on every loop iteration. Consider preallocating for speed.
L 44 (C 13-15): Variable appears to change size on every loop iteration. Consider preallocating for speed.
L 47 (C 21): A '[' might be missing a closing ']', causing invalid syntax at ')'.
L 47 (C 51): A '(' might be missing a closing ')', causing invalid syntax at ';'.
L 47 (C 54): Parse error at ']': usage might be invalid MATLAB syntax.
L 48 (C 17): Add a semicolon after the statement to hide the output (in a function).
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