Save to json problem

I create these columns from a for loop. idx are indexes eg idx=[2 3 45].

Area ,Eccentricity etc are regionprops.

Each Pollen has an Area ,an Eccentricity,an Euler etc

I try to save to json by creating a structure.I use saveJSONfile from Matlab Exchange

i have this problem

for j=1:length(idx)
Pollen(j,:)=j;
Area(j,:)=area(idx(j)).Area;
Eccentricity(j,:)=eccentricity(idx(j)).Eccentricity ;  
Euler(j,:)=euler(idx(j)).EulerNumber;
Perimeter(j,:)=perimeter(idx(j)).Perimeter;
Orientation(j,:)=orientation(idx(j)).Orientation;

end


    data.Pollen=Pollen'
    data.Area=Area'
    data.Eccentricity=Eccentricity'
    data.Euler=Euler'
    data.Perimeter=Perimeter'
    data.Orientation=Orientation'

   fullFileNameJason=fullfile(folder,'SingleValues.json');
   saveJSONfile(data, fullFileNameJason);

Answer 1

[KSSV]

Check the way you are creating the structure....Read about structure

S = struct ;
for i=1:3
    S(i).Pollen = rand(1,3) ;
    S(i).Area = rand(1,3) ;
end

[DIMITRIOS THEODOROPOULOS]

i tried and it gives me only the first value of the matrices

data=struct;
for i=1:numel(Pollen)
    data(i).Pollen=Pollen(i,1);
    data(i).Area=Area(i,1);
    data(i).Eccentricity=Eccentricity(i,1);
    data(i).Euler=Euler(i,1);
    data(i).Perimeter=Perimeter(i,1);
    data(i).Orientation=Orientation(i,1);
    
end

   fullFileNameJason=fullfile(folder,'SingleValues.json');
saveJSONfile(data, fullFileNameJason);

[KSSV]

YOu need to include another loop to fill more values.

[DIMITRIOS THEODOROPOULOS]

The matrices are columns /rows.. as i showed in picture..

How can i do it then with 2 for loops??

I am a beginner..

[KSSV]

data=struct;
for i=1:numel(Pollen)
    for j = 1:4
        data(i).Pollen=Pollen(i,j);    
        data(i).Area=Area(i,j);
        data(i).Eccentricity=Eccentricity(i,j);
        data(i).Euler=Euler(i,j);
        data(i).Perimeter=Perimeter(i,j);
        data(i).Orientation=Orientation(i,j);
    end
    
end
fullFileNameJason=fullfile(folder,'SingleValues.json');
saveJSONfile(data, fullFileNameJason);

[DIMITRIOS THEODOROPOULOS]

Index exceeds matrix dimensions.......

says.....

[KSSV]

You need to fix the loop j...may be it takes values from 1:3.