Book
Getting started with MATLAB
Author
Rudra Pratap
Edition
sage: x,y,z=var('x,y,z') sage: contour_plot(-1/2*x**2+x*y+y**2,(x,-5,5),(y,-5,5)) <html><font color='black'><img src='cell://sage0.png'></font></html>
Solution by:
<VINAY>, < STUD.>, < SIT,pUNE>
<Your Name>, <Profession>, <Organization>