Extract necessary fields values from .mat; Combining coordinates.

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Vktor Malic 2019-1-16

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https://ww2.mathworks.cn/matlabcentral/answers/440088-extract-necessary-fields-values-from-mat-combining-coordinates

评论： Luna 2019-1-18

采纳的回答： Luna

Hi,

I have matrix shown bellow:

I need to extract fields :

fname
bbpx-x1 , bbpx-y1, bbpx-x2,bbpx-y2 (combined in one row as [39 , 116, 569, 375].

So as a result I should get Output 8144*2 ;

'00001.jpg' [39 , 116, 569, 375]

'00002.jpg' [64 , 336, 159, 275]

... ....

'n.jpg' [n , n, n, n]

Thank you for your help!

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Luna 2019-1-16

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Hi Vktor,

Try this below:

outPutCellArray = cell(numel(myStruct),2);
for i = 1:numel(myStruct)
 outPutCellArray{i,1} = myStruct(i).fname;
 outPutCellArray{i,2} = [myStruct(i).bbpx_x1,myStruct(i).bbpx_y1, myStruct(i).bbpx_x2, myStruct(i).bbpx_y2];
end

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Luna 2019-1-18

Btw, you are asking for a table but showing a dataset example in your variables window. These are also different things too.

Luna 2019-1-18

在 MATLAB Online 中打开

Try this then,

outPutCellArray_new = cell(numel(myStruct),2);
for i = 1:numel(myStruct)    
    temp = [myStruct(i).bbpx_x1,myStruct(i).bbpx_y1, myStruct(i).bbpx_x2, myStruct(i).bbpx_y2];  
    outPutCellArray_new{i,1} = myStruct(i).fname;
    outPutCellArray_new{i,2} = strrep(strrep(strrep(num2str(temp),'   ',' '),'  ',' '),' ',',');
end
C = cell2table(outPutCellArray_new);