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
– Wolfie, Commented Jul 12, 2017 at 13:12

acampb311 · Accepted Answer · 2017-07-12 13:19:05Z

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, 2017 at 13:19

acampb311

3434 silver badges11 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

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

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related