Recent content by cpeng

wel these 3 equations will represent 3 coordianted of plot(x,y,z) combine plot of these equation. i have tried ezsurf('-5*x.^2 - 2*y.^2 + 2*(x.*y) + 4*y + 4*x -4' ,'x.^2 +3*x +2*y +x*y +5 ','-7*x.^2 +3*x -6*y +5*(x.*y) +2 '); thats work

i want to plot these equations in 3d Eq 1= 5x^2 - 2y^2 + 4x+ 4y -4 +2xy Eq 2 =x^2 +3x +2y +xy +5 eq 3 = -7x2 +3x -6y +5xy +2 i tried plot3 with 3 matix of x,y,z but i am not satisfied with the result. please if anyone know how to plot these equations.let me know thanks in advance