How to store multiple arrays into a single one?

Question

Mariana 2020-5-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/522585-how-to-store-multiple-arrays-into-a-single-one

评论： Mariana 2020-5-3

array_1 = zeros(1,9);
array_2 = zeros(500,16);

With the increase in time I will be concatenating arrays one and two into array3. I tried it by doing this:

array_3 = [array_1,array2];

Since, they are not from the same size, they can´t be concatenated.

Any ideas on how can I save them?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Stephen23 2020-5-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/522585-how-to-store-multiple-arrays-into-a-single-one#answer_429900

在 MATLAB Online 中打开

Use a cell array:

C = {array_1,array_2}

https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-cell-array.html

3 个评论
显示 1更早的评论隐藏 1更早的评论

Stephen23 2020-5-3

"Is it better to use an cell array or an structure?"

It depends entirely on what you are doing:

if your data have an inherent sequence, then use a container array which can be accessed using indices (e.g. cell array, non-scalar structure, table rows).
if your data are best identified by parameter names, then use a container array which lets you use names (e.g. structure, table columns).

Use the simplest data type that can reasonably hold your data, as this will simplify your code.

Mariana 2020-5-3

在 MATLAB Online 中打开

How to initialize the cell array?

function y = (input,vector)
    persistent count
    persistent array_3
    persistent array_2
    persistent array_1
    persistent Matrix
    
    if isempty (array_3) 
       array_3 = cell(1000,2); 
       %array_3 = cell(repmat({zeros(1,9)}, 100, 1),repmat({zeros(1,9)}, 100, 2));
       count = 0;
       array_1 = zeros(1,9);
       array_2 = zeros(500,16);
    end   
        
    %Merge
    Matrix(1:500,1:15)= data;
    Matrix(1:500,16)= input;
    
    %Look through the data
    peak = find(Matrix(:,16)== 1);
    val = length(peak);
    
    if val > 5
        Counter = Counter + 1; 
        array_3{Counter,1} = array_1;
        array_3{Counter,2} = array_2;
    end
        
 y = array_3;

Error:

Simulink does not have enough information to determine output sizes for this block. If you think the errors below are inaccurate, try specifying types for the block inputs and/or sizes for the block outputs.

Component:MATLAB Function | Category:Coder error

Cell arrays as top-level function outputs are not supported in MATLAB Function Block. Output 'Output' is a cell array.

请先登录，再进行评论。