Hi. I'm trying to plot a polynomial function but I'm not getting the desired output. Can you tell me what I'm doing wrong?

The original question is: and I need to plot it over an interval of (-2:1). My code is :

and my output is:

whereas my desired output is:

I'm not sure what I'm doing wrong

[William Rose]

@Zainab Waqar,

replace

x=-2:1;

with

x=-2:.01:1;

to get a step size of .01, instead of a step size of 1.

Good luck!

[Zainab Waqar]

@William Rose thankyou it worked!

[John D'Errico]

Of course, what @William Rose said SHOULD have been an answer. I can't rectify that, not yet at least. :)

See that what you did was to plot FOUR points on that curve, then connected by default with straight lines. You want to plot a zillion points on that curve, so use what was suggested to you by @William Rose.

Answer 1

[William Rose]

@Zainab Waqar,

replace

x=-2:1;

with

x=-2:.01:1;

to get a step size of .01, instead of a step size of 1.

Good luck!

[John D'Errico]

@Zainab Waqar: Please accept this answer if it helped you. That gives rep to the responder.

[William Rose]

@John D'Errico, thank you.