Scilab-Branch-6.1-GIT
Please note that the recommended version of Scilab is 2025.0.0. This page might be outdated.
See the recommended documentation of this function
meshgrid
Cria matrizes ou arrays 3-D a partir de vetores replicados em 2 ou 3 dimensões
Seqüência de Chamamento
U = meshgrid(u) [U, V] = meshgrid(u) [X, Y] = meshgrid(x, y) [X, Y, Z] = meshgrid(x, y, z)
Parâmetros
- u, x, y, z
- Vetores de qualquer tipo, de comprimento nx, ny, nz.
- U, V
- Matrizes quadradas de tamanho nu x nu
- X, Y, Z
- Matrizes ou hipermatrizes do mesmo tamanho [ny, nx] ou [ny, nx, nz].
Descrição
meshgrid (..) constrói matrizes ou matrizes 3D replicando vetores de entrada ao longo de 2 ou 3 dimensões.
To create arrays of size [nx, ny] instead of
[ny, nx], or with more than 3 dimensions, please use
ndgrid(x, y) or ndgrid(x, y, z,..) . |
Most of Scilab 2D or 3D graphical functions like champ() ,
grayplot() , Sgrayplot() ,
plot3d() , contour() , etc.. work with grids
generated with ndgrid() , not from
meshgrid() . Data computed on grids coming from
meshgrid() will require being transposed (please see the
example thereafter). |
Exemplos
[X, Y] = meshgrid(0:2)
--> [X, Y] = meshgrid(0:2) X = 0. 1. 2. 0. 1. 2. 0. 1. 2. Y = 0. 0. 0. 1. 1. 1. 2. 2. 2.
[X, Y] = meshgrid(["a" "bc" "αβγδ"], [-3 5])
--> [X, Y] = meshgrid(["a" "bc" "αβγδ"], [-3 5]) X = !a bc αβγδ ! !a bc αβγδ ! Y = -3. -3. -3. 5. 5. 5.
Application to grids for graphics:
// Generating data x = -1:0.1:1.7; y = -1:0.1:1; [X, Y] = meshgrid(x, y); Z = sinc(2*%pi * X.*Y); // Setting the graphic figure clf drawlater gcf().color_map = parulacolormap(64); gcf().axes_size = [650 530]; // Plotting subplot(2,2,1) Sgrayplot(x, y, Z') title(["Sgrayplot(x, y, Z'' ) " "$←\;Z^t\; required$"], "fontsize",3) isoview, colorbar subplot(2,2,2) plot3d(x, y, Z', -125,50) gce().color_flag = 1; title(["plot3d(x, y, Z'' ) " "$←\;Z^t\; required$"], "fontsize",3) isoview subplot(2,2,3) champ(x,y,sin(2*X'),cos(2*Y')) title(["champ(x, y, sin(X'' ),cos(Y'' ))" "$←\;X^t\;\;Y^t\; required$"], "fontsize",3) isoview subplot(2,2,4) surf(X, Y, Z) title("surf(X, Y, Z)", "fontsize",3) isoview gcf().children.tight_limits = ["on" "on" "on"]; drawnow
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