3D Graphic from 40 files

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Frank Pernett on 4 Sep 2020
Answered: Frank Pernett on 5 Sep 2020
Hi. I have 40 tables that contain dive profiles (Dives.mat). As the sampling rate is 1 second, every datapoint for depth (Dephtm) is 1 second.
Every table has different sizes going from 8000 to 18000 rows. I use the next script to plot all dive profiles at once:
filePattern = fullfile("Dives.mat");
matFiles = dir(filePattern);
for k = 1:length(matFiles)
baseFileName = matFiles(k).name;
fullFileName = fullfile(baseFileName);
fn = fieldnames(matData);
for k=1:numel(fn)
plot(matData.(fn{k}).Depthm);
hold on
end
hold off
end
And this is the result: I have a 40 x 1 array with the Age of every diver.
My first question is how I can modify my code to plot a 3D graph where Z are the lines.
And the second, how can I link the Age array into the code to have the 3D graph ordered also by age.
Thanks
Frank Pernett on 4 Sep 2020
Hi Geoff. X will be the data points of Depth. Y will be Depth and Z will be the cases. X and Y will have the same dimension but it will change as every table has different values. And Z will be 40 that is the number of files.
Thanks

Cris LaPierre on 5 Sep 2020
Edited: Cris LaPierre on 5 Sep 2020
Here's one way. Since we didn't have your data, I made my own. You will have to do some adapting to get it to work with your variable names, though.
Age = randi(40,[40,1])+16;
% Sort age, capturing original position
[sAge,idx]=sort(Age);
% create structure with 40 random data series with lengths 8000-18000
for d = 1:40
r = randi(10000,1)+8000;
dive(d).depth = rand([r,1])*d;
end
% Plot depth data is dive structure. X=index, Y=depth,Z=case
for z=1:length(dive)
% plot dives in age order using Age sort index info
y=dive(idx(z)).depth;
x = 1:length(y);
plot3(x,y,z*ones(size(x)))
hold on
end
hold off
Cris LaPierre on 5 Sep 2020
You will have to adapt my code to fit your data. However, I find your code a little confusing. Perhaps you have tried to edit it to make it simpler? You also use the same loop counter variable (k) in your nested for loops.
Here's your code modified (my best guess).
% I don't understand how this part works
filePattern = fullfile("Dives.mat");
matFiles = dir(filePattern);
for k = 1:length(matFiles)
baseFileName = matFiles(k).name;
fullFileName = fullfile(baseFileName);
end
% Once all the data is loaded, you can plot it in age order
[sAge,idx]=sort(Age);
fn = fieldnames(matData);
for k=1:numel(fn)
y=matData.(fn{idx(k)}).Depthm;
x = 1:length(y);
plot3(x,y,z*ones(size(x)))
hold on
end
hold off

Frank Pernett on 5 Sep 2020
Thank you so much Cris.
This is the result of your code ( I need to simplify mine a lot). Just need to adjust the axex, but that is not so difficult!!.

R2020a

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