How to properly write a matrix in a for loop?

Question

David Mrozek 2021-3-16

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https://ww2.mathworks.cn/matlabcentral/answers/774662-how-to-properly-write-a-matrix-in-a-for-loop

评论： David Mrozek 2021-3-19

Hello everyone,

I have been trying various ways to create a gcode for 3D printers. My probably last goal will be to create such a code only in MATLAB without external software being active. Hence I have written a code which should give me a total of 12 gcode unnested gcode instructions (equal to the data_test attachment of a 1 x 12 cell):

for gc = 1:12
    append_1 = transpose(repelem("G1",height(Importset{1, gc})));
    append_2 = transpose(repelem("F1200",height(Importset{1, gc})));
    append_3 = transpose(repelem("X",height(Importset{1, gc})));
    append_4 = transpose(repelem("Y",height(Importset{1, gc})));
    append_5 = transpose(repelem("Z",height(Importset{1, gc}))); 
    T3 = Importset{1, gc}(:,1);
    T4 = Importset{1, gc}(:,2);
    T5 = Importset{1, gc}(:,3);
g_code = [append_1 +  append_3 + T3 + append_4 + T4 +  append_5 + T5 + append_2];    % this gives me only one out of the inital 12 cells !!
end

The result, see the attachment file "g_code_unfinished", is just one out of the twelve cells and not the desired full twelve cells. So I would like to ask you where my mistake is?

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David Mrozek 2021-3-16

I want to achieve the same data structure (like in the g_code_unfinished attachment) for all my cells. Currently I only have one out of the 12 cells in my desired structure (because my for loop is wrong)

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Answer 1

Aghamarsh Varanasi 2021-3-19

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https://ww2.mathworks.cn/matlabcentral/answers/774662-how-to-properly-write-a-matrix-in-a-for-loop#answer_652592

编辑：Aghamarsh Varanasi 2021-3-19

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Hi David,

For the 'gcode' variable to save all the data for 12 cells of input, 'gcode' also needs to be a cell array of size 12. And the calculated value needs to be stored in the variable 'gcode'. Small tweaks to your code can help you achieve this.

% initialize g_code to be a cell array of size 1 x 12
g_code = cell(1,12);
for gc = 1:12
    ... % your code for calculating other variables goes here
        
    % append the current result of this iteration of for loop to the g_code variable    
    g_code{gc} = [append_1 +  append_3 + T3 + append_4 + T4 +  append_5 + T5 + append_2];
end