Defining a time varying function

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Deepa Maheshvare 2020-2-25

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https://ww2.mathworks.cn/matlabcentral/answers/507408-defining-a-time-varying-function

评论： Adam 2020-2-26

I'd like to create a function that will output a value of a (e.g. a = 10) for time < t0 and value equal to b at time > t0.

Any suggestions on how to create such a function in MATLAB will be helpful

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Answer 1

Adam 2020-2-25

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https://ww2.mathworks.cn/matlabcentral/answers/507408-defining-a-time-varying-function#answer_417246

编辑：Adam 2020-2-25

在 MATLAB Online 中打开

if t < t0
    result = a;
else
    result = b;
end

gives what you want for this simple case, provided t0, a, b and t are all passed into the function or defined at the top of the function. If it where more complicated I might suggest other methods but a simple binary threshold output works fine with an if statement.

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Deepa Maheshvare 2020-2-26

Many thanks for the answer. Binary threshold output works fine but it creates a discontinuity at t = t0. Could you please suggest continuous functions ? For instance when a > b, I'd like to create a function that will gradually decrease from a to b.

Adam 2020-2-26

You'd need to rephrase the question to more precisely ask what you want in that case. To fulfill what you asked in the question then including a reasult of mean( [a, b] ) for t == t0 would be the only approach that is slightly less discontinuous.

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