Plot 3D array

Hi,

I have a cell array of 1x10 (variable k) where each of the 10 arrays are matrices of 80x31.

Now I want to make a 3D plot with x=1:80, y=k=1:10 and z my cell array.

I have tried with

surf(1:80,k,mycell{1:length(k)}(1:80,1))

but it does not work.

Any help will be very much appreciated.

Answer 1

[Anudeep Kumar]

Hey Auryn_

Assuming random values for your variable “k” the code below explains how to plot in 3D using “surf”:

% Initialize the cell array

numMatrices = 10; % Number of matrices (cells)

numRows = 80; % Number of rows in each matrix

numCols = 31; % Number of columns in each matrix

% Create a cell array with random numbers

k = cell(1, numMatrices);

for i = 1:numMatrices
    
    k{i} = rand(numRows, numCols); % Each cell contains an 80x31 matrix
    
end

% Define the x and y axes for the plot

x = 1:numRows; % X-axis

y = 1:numMatrices; % Y-axis (for each matrix in the cell array)


% Preallocate a matrix to hold the Z values

z = zeros(numRows, numMatrices);


% Calculate the mean of each row for each matrix

for i = 1:numMatrices
    
    % Compute the mean across columns for each row
    
    z(:, i) = mean(k{i}, 2); % Mean of each row
    
end

% Create the 3D surface plot
figure;
surf(x, y, z');
xlabel('X');
ylabel('Matrix Index (Y)');
zlabel('Mean Value (Z)');
title('3D Surface Plot of Random Cell Array Data');

Here is the documentation for “surf” for reference:

https://www.mathworks.com/help/releases/R2024b/matlab/ref/surf.html