Graph function problem Incorrect values

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Emilia 2022-7-28

评论： Emilia 2022-7-28

Hello,

I have this function, If I want to produce a graph in the range of 0<x<50 it does not give a correct answer of y. Thanks for the helpers

x=1
y=-x.^3+3*x.^2+2*x-27
y =
   -23
   
   %%plot
   
   x=[0:50];
y=-x.^3+3*x.^2+2*x-27;
plot(x,y)

Chunru 2022-7-28

What's wrong?

x=[0:50];

y=-x.^3+3*x.^2+2*x-27;

plot(x,y)

Chunru 2022-7-28

The y axis scale is x10^4. If you zoom in, you will see the correct value.

Emilia 2022-7-28

Yes, you're right, I didn't notice. Thank you! :)

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