Why does my data have more than 2 dimensions?

Question

C Kroeger 2017-3-24

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评论： ilyes louahem m'sabah 2022-3-10

I used the "Data Logging" tool in Simulink to collect the outputs of a model, but there seems to be a dimensions problem with one of them.

I extracted the values of the different signals using

>>test=logsout.getElement(1).Values.Data;

but when trying to plot it, I get "Error using plot. Data cannot have more than 2 dimensions." While other signals have the format 18001x1 double, this one has the format 1x1x18001 double. When typing the signal name in the command window, the values look like this:

   >>test
    test(:,:,204) =
    4.2991
    test(:,:,205) =
    4.2156
    test(:,:,206) =
    4.2530

How can I convert the Signal to a "normal" one (just the values)?

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Answer 1

ES 2017-3-24

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test = test(:,:)'

will convert your 1x1x18001 to 18001x1

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C Kroeger 2017-3-24

Works. Thank you!

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Answer 2

dbmn 2017-3-24

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在 MATLAB Online 中打开

There is multiple options to force your 3d data into a vector

Option 1: use dot notation

% gets you a column vector
a(:) = test(1,1,:);
% gets you a row vector
b(:,1) = test(1,1,:);

Option 2: Shape to your likings

c = reshape(test, [numel(test), 1]);

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C Kroeger 2017-3-24

The first Option didn't work: "Conversion to cell from double is not possible."

The second however did work. The solution of "chocolate Warrior" seems simpler though.

ilyes louahem m'sabah 2022-3-10

Option 2 worked. thank you

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