How to get values out of an unknown structure array inside a *.mat file?

I have many *.mat files, each of them stores a structure array. I am trying to use the below commands to get the values out of their structure arrays:

File = 'a.mat';
b=whos(matfile(File));

Below are the results of 'b' on my command window. In this example, I know S1103 is the name of the structure array. I can use S1103{1} to get the data values I want. But I have many *.mat files with unknown structure array names. How do I get their values. I tried to use b.name{i}, which does not seem to work.

          name: 'S1103'
          size: [1 16384]
         bytes: 49138764
         class: 'cell'
        global: 0
        sparse: 0
       complex: 0
       nesting: [1x1 struct]
    persistent: 0

Answer 1

[Azzi Abdelmalek]

data=load('filename')
variables=fields(data)

[Leon]

Thank you for the reply. I just tried it, variables = 'S1103', which is the name of the array. How do I get the values out of the array?

So bad I can not read the array name using my eye, and then type S1103{i} to get their values, because I have so many of these *.mat files. But variables{i} does not seem to work.

[Azzi Abdelmalek]

data=load('filename')
variables=fields(data)
data.(variables{1})

[Leon]

Works!!! Thank you a bunch.

Have a happy Thanksgiving!

[Larry B]

I was interested in accessing the stored data in .mat file where I do not know the variables. Above answer displayed the variable, but I still could not access the data associated with that file. Old MATLAB had a variable editor, but my 2018a version does not appear to have it in the same form as say 2012b. To access the data, I clicked on the "filename.mat" file, which placed it in the window in the lower lefthand corner. Next executed "Load(filename.mat)" and then execute "openvar(filename.mat)," which opened a variable editor with all the variables listed in a file form. I then clicked on the variables and got access to the stored data.

[Prudvi Kamtam]

You just saved my project! Thanks! ?