how to change grid option(size of grid & granularity)
9 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
fred bnm
el 6 de Dic. de 2015
Comentada: Star Strider
el 6 de Dic. de 2015
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)
how to change grid option like this image :
0 comentarios
Respuesta aceptada
Star Strider
el 6 de Dic. de 2015
Editada: Star Strider
el 6 de Dic. de 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
Explore the options (grid size, interpolation method, etc.) presented in the interp2 documentation.
6 comentarios
Star Strider
el 6 de Dic. de 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.
Más respuestas (0)
Ver también
Categorías
Más información sobre Surface and Mesh Plots en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!