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how to graph this system of questions into mathlab

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adam
adam on 22 Oct 2020
Edited: Alan Stevens on 22 Oct 2020
Here is my question to solve: Graph the following system on the same set of axes
f(𝑣) = { −0.001778 ∙ 𝑣^2 + 0.05333 ∙ 𝑣 𝑖𝑓 0 ≤ 𝑣 < 30
{ 0 𝑖𝑓 𝑣 ≥ 30
Plots the efficiency for speed ranging from 0-35

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Answers (1)

Alan Stevens
Alan Stevens on 22 Oct 2020
Edited: Alan Stevens on 22 Oct 2020
You can define the function as follows
f = @(v) (-0.001778*v.^2+0.05333*v).*(v<30);
The (v<30) part simply multiplies the rest by 1 if v is less than 30, and by 0 if v is greater than or equal to 30.
Then construct a vector of values of v running from 0 to 35; call th function with these values to create a vector y, then plot y against v.

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