How to plot polynomial function correctly?

Hello, I'm trying to plot polynomial function but output is always bad. Can you help me find, what I'm missing? Thank you.

This is my code:

d = @(g)1-5*g-2.5*g.^2+6*g.^3+5*g.^4;
e = -2:1/100:2;
plot(e,d(e));

This is what I'm getting:

And this is what I want:

Answer 1

[Alex Mcaulley]

Your code is working fine, the difference is just the axis limits. Try this:

d = @(g)1-5*g-2.5*g.^2+6*g.^3+5*g.^4;
e = -2:1/100:2;
plot(e,d(e));
ylim([-2,5])
xlim([-3,6])

Answer 2

[John D'Errico]

Hmm. Why does this feel like deja vu? (Answer: I just answered almost the same question for someone else, not 5 minutes ago.)

d = @(g)1-5*g-2.5*g.^2+6*g.^3+5*g.^4;
e = -2:1/100:2;
plot(e,d(e));
grid on

It looks fine to me. Whats the problem? That two programs arbitrarily chose a different set of axes to plot the same curve?

axis([-3,4.5,-1.5,4.5])

Same curve. Same plot. Very different conclusions, just by changing the axis scaling.

[Adrian Brand]

thank you very much too.

[María Guadalupe Gama Cruz]

how do you plot the x axis?