What does ~ signify in: function [x, f, g] = defineSystem(~, params)

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Pallov Anand 2022-11-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1853083-what-does-signify-in-function-x-f-g-definesystem-params

评论： Pallov Anand 2022-11-17

采纳的回答： Torsten

function [x, f, g] = defineSystem(~, params)

syms p v z % states

x = [p; v; z];

f0 = params.f0;

f1 = params.f1;

f2 = params.f2;

v0 = params.v0;

m = params.m;

Fr = f0 + f1 * v + f2 * v^2;

% Dynamics

f = [v; -Fr/m; v0-v];

g = [0; 1/m; 0];

end

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采纳的回答

Torsten 2022-11-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1853083-what-does-signify-in-function-x-f-g-definesystem-params#answer_1101893

It signifies that the function "defineSystem" is usually called with two inputs, but that the first input can be ignored in the actual case because it is not needed to calculate the output variables x, f and g.

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Pallov Anand 2022-11-17

Ok, got it. Thanks

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