# 3d plot in matlab

by cpeng
Tags: matlab, plot
 P: 2 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. plz if any one know how to plot these equations.let me know thanks in advance
 P: 1,672 What kind of plot are you trying to make? I'm going to assume a surface plot since you didn't specify. Here is an example using the "surf" command. x = 1:1:100; y = 1:1:100; [X,Y] = meshgrid(x,y); Z = X.^2.*Y.^3; surf(X,Y,Z)
 P: 2 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
 P: 1 3d plot in matlab Hi, I have 3 vectors of the same dimensions and want to plot a graph in 3D as surface or volume. I tried but I couldn't. Any body knows? Vectors arr: A=[2 5 15 25 30] B=[0.1 0.2 0.5 0.9 1.0] C=[1870 1890 1920 2000 2050] thanks, PK
P: 3
 Quote by cpeng 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. plz if any one know how to plot these equations.let me know thanks in advance

for this one u can use this,

also mention the x and y values, ie starting and ending as x=1:10; y=1:10;

surf(x,y,Eq 1);
surf(x,y,Eq 2);
surf(x,y,Eq 3);
P: 3
 Quote by pashasrp67 for this one u can use this, also mention the x and y values, ie starting and ending as x=1:10; y=1:10; figure; surf(x,y,Eq 1); surf(x,y,Eq 2); surf(x,y,Eq 3); hold on
so u can try with this
P: 3
 Quote by pkmalik Hi, I have 3 vectors of the same dimensions and want to plot a graph in 3D as surface or volume. I tried but I couldn't. Any body knows? Vectors arr: A=[2 5 15 25 30] B=[0.1 0.2 0.5 0.9 1.0] C=[1870 1890 1920 2000 2050] thanks, PK
u can use plot3 function

as

plot3(A,B,C);

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