3D plot with multiple files

Hi, I have series of data in 41 simlar group of matrix size [1x88] [41x1] [41x88].

Here 41 similar groups means the points on X axis and matrix [41x1] means the points on the Y axis.

matrix [1x88] [41x88] is the data to be plotted.

I want to know how can I plot this data in 3D? where X axis and Y are positions.

Answer 1

[Cris LaPierre]

There's some punctuation issues making it difficult to understand the description of your data. Here's what I understand:

• X-values are contained in the matrix with dimensions [41x1]
• Y-values are contained in the matrix with dimensions [1x88]
• Z-values are contained in the matris with dimensions [41x88]

Still unsure how the multiple files factors in. However, yes, if you have those matrices as I described, you can plot in 3D. Now it just depends on what type of plot you want to create. Did you want a line plot? Scatter plot? Mesh? Surface? Plots are handled differently than surfaces. Meshes/surfaces are perfect for your data. With plots, you have to use meshgrid first. Just note that y values to meshgrid are rows of a matrix. Think of if you placed a 2D matrix directly on an X-Y axes.

Here's an example

x = linspace(0,2*pi,41)';   % 41x1
y = linspace(0,pi,88);      % 1x88
z = sin(x).^2 * cos(y).^2;  % 41x88

figure
surf(x,y,z')
xlabel('X')
ylabel('Y')
zlabel('Z')

figure
[Y,X] = meshgrid(y,x);    % Make X and Y 41x88 as well
scatter3(X(:),Y(:),z(:))  % Use linear indexing to turn X, Y, and z into vectors.
xlabel('X')
ylabel('Y')
zlabel('Z')

Surface:

Scatter: