![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/172320/image.png)
how to change grid option(size of grid & granularity)
9 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
i have this mask.and display that by meshc function?
z=[ 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000;
-0.0005 -0.0001 0.0000 0.0000 0.0000 0.0000;
0.0038 0.0001 -0.0005 -0.0000 0.0000 0.0000;
0.0074 0.0066 0.0027 -0.0003 0.0000 0.0000;
0.0054 0.0067 0.0078 0.0011 -0.0001 0.0000;
0.0000 0.0000 0.0000 0.0000 0.0000 0.0000];
meshc(z)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/152499/image.jpeg)
how to change grid option like this image :
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/152500/image.jpeg)
0 commentaires
Réponse acceptée
Star Strider
le 6 Déc 2015
Modifié(e) : Star Strider
le 6 Déc 2015
EDIT — To illustrate (literally):
og = [1:6]; % Original Grid (Vector)
[X,Y] = meshgrid(og); % Original Grid (Matrices)
qg = linspace(min(og), max(og), 25); % Query Grid (Vector)
[Xq,Yq] = meshgrid(qg); % Query Grid (Matrices)
zq = interp2(X,Y,z,Xq,Yq, 'spline'); % Interpolated ‘z’
figure(1)
meshc(Xq, Yq, zq)
grid on
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/172320/image.png)
Explore the options (grid size, interpolation method, etc.) presented in the interp2 documentation.
6 commentaires
Star Strider
le 6 Déc 2015
First — The ‘6’ in the original ‘x’ vector was used to create the (6x6) [X,Y] matrices necessary to provide an original independent variable reference for interp2, since ‘z’ is (6x6). The ‘25’ is simply the arbitrary length of the vector I used to create the [Xq,Yq] ‘query’ matrices for interp2. Any length will work, providing it produces a readable plot.
Second — If you want the interpolation matrices to be (15x16), create vectors to use in meshgrid to produce the appropriate ‘query’ matrices.
Third — Thank you, Image Analyst!
The code to produce a (15x16) interpolated grid:
og = [1:6]; % Original Grid (Vector)
[X,Y] = meshgrid(og); % Original Grid (Matrices)
qgx = linspace(min(og), max(og), 16); % Query Grid (X-Vector) (1x16)
qgy = linspace(min(og), max(og), 15); % Query Grid (Y-Vector) (1x15)
[Xq,Yq] = meshgrid(qgx, qgy); % Query Grid (Matrices) (15x16)
zq = interp2(X,Y,z,Xq,Yq, 'spline'); % Interpolated ‘z’
figure(1)
meshc(Xq, Yq, zq)
grid on
You can change the ‘qgx’ (query grid x) vector and ‘qgy’ vector to be anything you want. Experiment with other options available in the interp2 function.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Surface and Mesh Plots dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!