Reference to non-existent field when using variable for struct access

Question

I'm very new to Matlab and maybe a very basic question, but I need help:

I have a path:

file = C:\this\is\path\to\my_file.mat

This is a file which contains nested structure and I need just to access one variable. In my script, first I need to get the file name which I will use as variable later:

[pathstr,name,ext] = fileparts(file);

So, now I have the variable name with the content my_file.mat

S = load(file)

value = S.('name').structA.SubstructA1.variableA

Matlab is generating the message:

"Reference to non-existent field 'name'."

So, how is the correct way to use the variable in this case ?

Start with a blank workspace (using `clear`) then do `file = 'C\...'` and `load(file)`. Whatever variables you saved in `my_file.mat` will now be in your workspace, no assigning to new variables needed. Of course you don't always have to start with a blank workspace, but it makes this example clear. — Wolfie, Jul 12 '17 at 13:12

score 1 · Accepted Answer · answered Jul 12 '17 at 13:19

1

You are very close, just remove the single quotes from around the variable, name, like this:

value = S.(name).structA.SubstructA1.variableA

answered Jul 12 '17 at 13:19

acampb311

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Reference to non-existent field when using variable for struct access

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