Hi please help I can't run my code it says not enough input arguments line 3

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Sbongile Angel 2023-5-20

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https://ww2.mathworks.cn/matlabcentral/answers/1968849-hi-please-help-i-can-t-run-my-code-it-says-not-enough-input-arguments-line-3

回答： Dongyue 2023-5-23

% (i) pipe_velocity(): calculating the water velocity v (m/s) of a given pipe diameter d (mm) and flow rate Q (/s).
function v = pipe_velocity(d, Q)
    A = pi * (d / 1000)^2 / 4; % Cross-sectional area (m^2)
    v = Q / A; % Velocity (m/s)
end

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Torsten 2023-5-20

Without calling the function with numerical inputs for d and Q, what result do you expect ?

Walter Roberson 2023-5-20

When you pressed the green Run button, where do you expect matlab to look to find values for d and Q?

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Answer 1

Dongyue 2023-5-23

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https://ww2.mathworks.cn/matlabcentral/answers/1968849-hi-please-help-i-can-t-run-my-code-it-says-not-enough-input-arguments-line-3#answer_1242764

在 MATLAB Online 中打开

res = pipe_velocity(1,2)
res = 2.5465e+06
function v = pipe_velocity(d, Q)
    A = pi * (d / 1000)^2 / 4; % Cross-sectional area (m^2)
    v = Q / A; % Velocity (m/s)
end