# Regarding matlab

1. Jul 30, 2009

### mishal

Plot the parabola which has the equation y = x^2+2x+3 for -20<x<20 using Matlab.

2. Jul 30, 2009

### mishal

need the solution

3. Jul 30, 2009

### TChi

Hey, mishal,

This is the simple solution to your problem:
x = -20:0.01:20;
y = x.^2 + 2*x + 3;
plot(x,y);

By the way, you can search Matlab Help, that's very good source for self learning. And you can go to: http://www.mathworks.com/matlabcentral/index.html" [Broken] to find more .m files that might help you.

PS: Mathematics is a suitable source for this kind of question. (Or Homework or Coursework questions)

Last edited by a moderator: May 4, 2017
4. Jul 31, 2009

### MATLABdude

TChi, this is a particularly simple question, so what you did isn't particularly egregious, but we here at PhysicsForums try to help people work through their problems (especially when it's homework). Homework should be in the Homework section (there's an Engineering and CompSci section), but there's also a Computer Science and Programming subforum as well (and there's a Mathematical Software section within that--for things like MATLAB, Octave and/or Mathematica)

EDIT: mods will occasionally delete responses that out-and-out answer questions (that should be answered by the question asker), and move homework to appropriate subforums. Not to snerk, just to let you know.

5. Aug 2, 2009

### mishal

hey thankyou so much for your kind information