Error using sin in my code

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Lan 2023-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/2023282-error-using-sin-in-my-code

评论： Lan 2023-9-19

采纳的回答： Dyuman Joshi

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I keep getting error using sin and Not enough input arguments. I'm not sure what I did wrong here

x = z + (1/s).*sin.*(s*r0*t);

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Answer 1

Dyuman Joshi 2023-9-19

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sin is not a variable that you are multiplying with s*r0*t, it is a function which needs input arguements to provide an output.

So, remove the element-wise multiplication sign in between sin and the parenthesis, and it should work (Assuming variables have compatible sizes for the operations performed)

%Corrected
x = z + (1/s).*sin(s*r0*t);

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Lan 2023-9-19

Thank you both so much. It worked!

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Answer 2

Walter Roberson 2023-9-19

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The .* operator is element-by-element multiplication. Your code is asking to evaluate the token sin and multiply the result by (s*r0*t) . But sin as a token is a request to evaluate the sin function with no parameters, which is a problem because sin() needs to be passed one parameter.

If you want to take the sine of something, you need sin(EXPRESSION) such as sin(s*r0*t)