How can I plot two functions in the same graph?

6 次查看（过去 30 天）
Wenchen Liu
Wenchen Liu 2022-11-1
编辑： Torsten 2022-11-1
I have a code like this:
fplot(@(x) cosh(x))
hold on
p(x) = 0.6671x^3-1.7921x^2+2.7580x-0.089
fplot(@(x) p(x))
hold off
since p(x) is a more complex function. And when I try to run the code, the command shows "Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters,
or other syntax error. To construct matrices, use brackets instead of parentheses."
I don't know how to fix for this. Please me, thank you!

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采纳的回答

Torsten
Torsten 2022-11-1
编辑：Torsten 2022-11-1
Ran in:
fplot(@cosh)
hold on
p = @(x)0.6671*x.^3-1.7921*x.^2+2.7580*x-0.089;
fplot(p)
hold off

更多回答（1 个）

Jim Riggs
Jim Riggs 2022-11-1
编辑：Jim Riggs 2022-11-1
Try this:
fplot(@(x) cosh(x));
hold on
fplot(@(x) 0.6671x^3-1.7921x^2+2.7580x-0.089);

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