How can I programmatically access specific variables that are dynamically loaded?

I am trying to load a specific variable and use it in my program. When I do so (using the following code), the data comes in as a struct (e.g. x.out1, x.out2, etc.)

x=load(strcat('Testfiles\', testcase.filename),strcat('out',num2str(num_videos)));

Because the content of x is dynamic, I cannot explicitly state which outN I am looking for in the code.

vid=x.out(...);

Because this is not a string, but a variable assignment, I cannot use strcat('out',num2str(num_videos)).

How can I assign the loaded variable to vid?

Thanks, Sean

[Stephen23]

Solution:

https://www.mathworks.com/help/matlab/matlab_prog/generate-field-names-from-variables.html

Answer 1

[Fangjun Jiang]

Use fieldnames() to get your true variable names then use dynamic field name technique to get the value.

VarNames=fieldnames(x);
MyVarName=VarNames{1};
Value=x.(MyVarName)