Loop through a cell array to use plot3

Question

Marie P. 2020-12-8

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https://ww2.mathworks.cn/matlabcentral/answers/687489-loop-through-a-cell-array-to-use-plot3

编辑： Marie P. 2020-12-8

Hello, I have the cell arrays jN, jP and jC with the size of 1x20. Each entry holds a n x 1 matrix with a different size of n(each one is +10 entries bigger than the previous one). The data was generated by an ode45 solved for the time. I am trying to plot each dataset of jN, jC and jP together in a plot3 diagramm. Each data set (jC{1,1},jP{1,1} and jN{1,1})belong together and have each the same size, means that I want to plot one graph inlcuding one row of jC, jN and jP and so on until the 20th data sets all together in one diagram. I tried to loop through the entries for a plot 3 diagram but wasn't sucessfull so far.

That's what I did:

for i=1:20
hold on
plot3(jN{1,i},jC{1,i},jP{1,i})
hold off
end

But then I only get the first entries together.

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Answer 1

Ive J 2020-12-8

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https://ww2.mathworks.cn/matlabcentral/answers/687489-loop-through-a-cell-array-to-use-plot3#answer_569444

编辑：Ive J 2020-12-8

在 MATLAB Online 中打开

Try

for i=1:20
    plot3(jN{1,i}, jC{1,i}, jP{1,i})
    hold on
end
grid on
hold off

You could also concatenate your vectors and call plot3 once:

jN = vertcat(jN{:}); jC = vertcat(jC{:}); jP = vertcat(jP{:});
plot3(jN, jC, jP); % if wanna show all together

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Marie P. 2020-12-8

I did and I just added a grid to the plot with the first data set

Ive J 2020-12-8

编辑：Ive J 2020-12-8

在 MATLAB Online 中打开

I reproduced your data structure, and got a 3D plot:

% simulate data points 
[jN, jC, jP] = deal(cell(1, 20));
for i = 1:numel(jN)
    jN{i} = rand(100 + 10*(i - 1), 1);
    jC{i} = rand(100 + 10*(i - 1), 1);
    jP{i} = rand(100 + 10*(i - 1), 1);
end
% plot them 
for i=1:20
    plot3(jN{1,i}, jC{1,i}, jP{1,i})
    hold on
end
grid on
hold off