Drawing a function graph?

2018 11 23
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madhan ravi
madhan ravi 2018-11-23
编辑：madhan ravi 2018-11-23

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see fplot()(link)
Use syms x and use fplot() to plot the function

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Gaston Gakomo
Gaston Gakomo 2018-11-23
Hi, im getting error when i write the function.
what is the correct way for matlab to understand it ?
madhan ravi
madhan ravi 2018-11-23
编辑：madhan ravi 2018-11-23
Read the link in the answer I posted and upload the code that you are trying
Gaston Gakomo
Gaston Gakomo 2018-11-23
like this ?
>> syms f(x)
>> f(x)= x^3-x^2+2*x-4;
>> fplot(f)
Gaston Gakomo
Gaston Gakomo 2018-11-23
Using the graph, i need to find the solutions for the equation in three decimal places.
but im only getting one line?
madhan ravi
madhan ravi 2018-11-23
编辑：madhan ravi 2018-11-23
syms f(x) y
f(x)= x^3-x^2+2*x-4;
fplot(f)
hold on
fplot(subs(y,0))
sol=vpasolve(f) %you can see two imaginary roots
solutions = roots(sym2poly(f))
Gaston Gakomo
Gaston Gakomo 2018-11-23
thank you very much.
madhan ravi
madhan ravi 2018-11-23
Anytime :)

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