Plotting 3 function using mesh command

3 views (last 30 days)
qudsia Bashir
qudsia Bashir on 10 Oct 2019
I have to plot 3 functions in matlab using mesh command but donot know how to do it please anyone help me?
  2 Comments
qudsia Bashir
qudsia Bashir on 10 Oct 2019
i solved an equation using 3 different method and now i want to plot the results obtained from these three methods.the function is of form u(x,y)

Sign in to comment.

Answers (1)

Alexandra McClernon Ownbey
The best way to plot using mesh is to create three 2-D matrices with the same sizes.
x = 0:.1:1;
y = 0:.5:10;
[xq,yq] = meshgrid(x,y);
z = (xq.^2-yq.^2);
figure()
mesh(x,y,z)
Although 'x' and 'y' are different sizes, meshgrid creates a 2-D grid for xq and yq with the m rows and n columns where m equals the length of y and n equals the length of x.
I find the easiest way to think of it is this way:
a 3-D plot needs values for each x, y, and z position. 'xq' is the x coordinates for each point. 'yq' is the y coordinates for each point, and 'z' is the z-coordinates for each respective point. So you create a 2-D grid and give each point some height 'z'.
You do not need to use meshgrid to create your initial 2D matrices, but I find it works well for most cases.
  4 Comments
Alexandra McClernon Ownbey
the length of your vector 'x' is 4, the length of your vector 't' is 6. just fix these dimensions to match. I suggest using linspace for t using the length of vector x.
I also would suggest initializing D using zeros.
D = zeros(20,1);

Sign in to comment.

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!