# How can I plot two functions in the same graph?

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Wenchen Liu il 1 Nov 2022
Modificato: Torsten il 1 Nov 2022
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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### Risposta accettata

Torsten il 1 Nov 2022
Modificato: Torsten il 1 Nov 2022
fplot(@cosh)
hold on
p = @(x)0.6671*x.^3-1.7921*x.^2+2.7580*x-0.089;
fplot(p)
hold off
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### Più risposte (1)

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