How can I read value from a json file and use it in the plot function?

Hello,

I would like to read a value from json file and use these values in the plot function.

So I did some resarch and realized that there is a lib named "loadjson" and I've added into my MATLAB. But I can't read values from my json file and cannot find a solution in MATLAB answers for it.

I'm kinda new at MATLAB and I need a bit of help :)

Thanks in advance.

The output of my json but I cannot see the values. I would like to read Location's values (locationX and locationY)

My JSON file:

"Location": [
    {
      "id": "0b5965e5-c509-4522-a525-8ef5a49dadaf",
      "measureId": "5a6e9b79-dbb1-4482-acc1-d538f68ef01f",
      "locationX": 0.9039769252518151,
      "locationY": 0.2640594070404616,
      "createdAt": "06-01-2021 19:38:44"
    },
    {
      "id": "18714a2f-a8b3-4dc6-8a5b-114497fa9671",
      "measureId": "671f52bc-a066-494a-9dce-6e9ccfac6c1d",
      "locationX": 1.5592001730078755,
      "locationY": 0.5207689756815629,
      "createdAt": "06-01-2021 19:35:24"
    },

My MATLAB code:

% Setting my image and related params
img = imread('C:/plan/plan.jpg');
imshow(img)
min_x = 0;
max_x = 7;
min_y = 0;
max_y = 3;
imagesc([min_x max_x], [min_y max_y], img);

% Load json file
data = loadjson('C:/data/default.json');
disp(data)

% I want to use these values into plot function.
hold on;
plot(x, y, 'ro', 'MarkerSize', 5);

Answer 1

[Yunus HAZNEDAR]

I did it like this. It works properly.

% Setting my image and related params
img = imread('C:/plan/plan.jpg');
imshow(img)
min_x = 0;
max_x = 7;
min_y = 0;
max_y = 3;
imagesc([min_x max_x], [min_y max_y], img);

data = loadjson('C:/data/default.json');
count_data = sum(cellfun(@(x) numel(x),data.Location));

for i=1:count_data
    hold on;
    x = cellfun( @(cellElem) cellElem.locationX, data.Location );
    y = cellfun( @(cellElem) cellElem.locationY, data.Location );
    plot(x(i), y(i), 'ro', 'MarkerSize', 5); %point
    plot([x(i) x(i+1)],[y(i) y(i+1)],'r') %line
end