Searching structure that has all caps field names with list that varies in case.

Hello,

I am comparing two separate files of data and have loaded the .mat files into structs. One file has field names that are in all capital letters. Ideally I just want to ignore the case altogether. Hpwever, I am unsure how to do this and so I have tried using:

x = upper(load('filename.mat'))
%and
x= load('filename.mat')
y=upper(x)

To change all the fields to uppercase. Niether of these work. ( I also changed the search variables to match case for this)

My code looks like this:

myVars = {'Abc_B', 'Aaa_A', 'B_Ahh', 'Ba_Bcc', 'Dea_C_CC' };

b_struct = load('filename1.mat'); %all upper case
f_struct = load('filename2.mat'); %variable case

for iVar=1:numel(myVars)
    
        f_sp = f_struct.(myVars{iVar});
        b_sp = b_struct.dArray.(myVars{iVar});
        ...        
end   

And the issue happens when b_struct tries to read in 'B_Ahh', because b_struct the field is 'B_AHH'

The error that matlab gives is this:

Reference to non-existent field 'B_Ahh'.

Error in final_dataPrep

b_sp = b_struct.dArray.(myVars{iVar});

But it outputs previous fields whose case match my search words.

Ideally, I just want to ignore the case altogether.

I am lost and frustrated about this. Any guidance would be greatly appreciated!

Answer 1

[Fangjun Jiang]

for iVar=1:numel(myVars)
        b_sp = b_struct.dArray.(upper(myVars{iVar}));
end  

[Georgia Kennedy]

Thank you for responding! However, this solution did not work, just returned the same error but in all caps.

[Fangjun Jiang]

Try this and figure it out

%%
clear b_struct
b_struct.dArray.B_AHH=1;
myVars{1}='B_Ahh';

b_struct.dArray.(upper(myVars{1})) % this works
b_struct.dArray.(myVars{1}) % this has error

ans =

     1

Reference to non-existent field 'B_Ahh'.

Error in Untitled (line 7)
b_struct.dArray.(myVars{1})

[Georgia Kennedy]

Ok, thank you for taking the time to answer and the guidance!