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When calling a function or indexing a variable, use parentheses.

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Fernando
Fernando 2023-11-20
回答： Walter Roberson 2023-11-20
Hello I am trying to solve this but I need some help to make it work. Kinda new working around matlab. your help would be totally appreciated. Thank you.

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回答（2 个）

DGM
DGM 2023-11-20
Ran in:
The error message tells you what to do. diag() is a function; [1 2 3] is a vector, so:
diag([1 2 3])
ans = 3×3
1 0 0 0 2 0 0 0 3
Walter Roberson
Walter Roberson 2023-11-20
The syntax for calling functions is function name followed by ( followed by a list of parameters followed by )
You are trying to use diag[Expressions] -- which would be the kind of calling syntax that Mathematica would use, but not MATLAB.
Use diag([Expressions]) instead.

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