How to extract a specific field value from struct

I am working in some data, and I have attained a struct (struct.mat) is enclosed.

struct with fields:

Connectivity: 8
ImageSize: [577 601]
NumObjects: 6
PixelIdxList: {[2695×1 double]  [2934×1 double]  [2877×1 double]  [3002×1 double]  [2733×1 double]  [3078×1 double]}

I am intrested in extracting NumObjects data from this struct, so that I can use this as an input to some place. Kindly advise, how I can specifically extract this info (NumObjects: 6) as an output file, so I can use it as input some other place.

thank you

Answer 1

[Stephen23]

https://www.mathworks.com/help/matlab/matlab_prog/create-a-structure-array.html

load('struct.mat')
cc

cc = struct with fields:
    Connectivity: 8
       ImageSize: [577 601]
      NumObjects: 6
    PixelIdxList: {[2695×1 double]  [2934×1 double]  [2877×1 double]  [3002×1 double]  [2733×1 double]  [3078×1 double]}

val = cc.NumObjects

val = 6

[Abdul Hannan Qureshi]

Issue resolved, exactly what I was looking for. Thanks alot for quick response.

Answer 2

[Amritesh]

You can extract the NumObjects field using the name of struct/ after loading structName.mat file

NumObjects = structName.NumObjects;

Then, save NumObjects in NumObjects.mat file

save('NumObjects.mat','NumObjects');

You can also save all fields of struct as different variables in a file

save('newstruct.mat','-struct','structName');

You can find more info at https://in.mathworks.com/help/matlab/ref/save.html

Hope this resolves your problem.

[Abdul Hannan Qureshi]

Thank you for assistance.