I would like to read a value from JSON file and use these values in the plot function. So I did some research 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.
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);
Output of the code:
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"
},
From the JSON structure, I expect each element in your Location
cell arrays to be a struct, with at least the fields locationX
and locationY
.
You can extract those fields with something like
x = cellfun( @(cellElem) cellElem.locationX, data.Location );
y = cellfun( @(cellElem) cellElem.locationY, data.Location );