How to access data from a struct when the dot notated reference is passed as a char array?

I have loaded some struct data into a container I'm calling 'CMData' in my function.

I want the function to access the array of data in 'CMData.Car_ax.data' which I'm passing in a char array to the function as an argument called 'signal'

I want to perform some other functions such as Standard Deviation, and some boundary value checks in which I want to iterate over the contents of the struct array but Matlab is doing this on the char array rather than the fields of struct CMData. For example, if I count the number of elements in 'signal' I get 18, which is the number of characters that make up 'CMData.Car_ax.data' when really I'm looking for a value of 3250.

How do I change this so that I am using a struct reference and not a char array?

[xi]

Can you paste your example code?

Answer 1

[prasanth s]

To to get the field names of struct array, use 'fieldnames' function

S.x=1;
S.y=2;

fields = fieldnames(S)

then, to get the data from struct array, refer following code

data1 = S.(fields{1})

[Stephen23]

See also:

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