How can I put a set of data into a vector ?

For a1,a2,...,a100, I want to set a = [a1 a2 ... a100]. Is there a better way?Thanks very much for your answers!

[Dyuman Joshi]

How do you get all the variables - a1, a2, ..., a100?

[wantinga]

I get these variables by using the following code

outputden_sym1 = wdenoise(y23,13,'Wavelet','sym1');

and a1 is the power of outputden_sym1. Here I have another question. How can I use the loop to calculate outputden_sym1-sym8?

[Dyuman Joshi]

Please share your full code and attach any data using the paperclip button.

[Stephen23]

"How can I use the loop to calculate outputden_sym1-sym8?"

The name MATLAB comes from "MATrix LABoratory", so you should use some kind of matrix/array and indexing, e.g.:

N = 100:
C = cell(1,N);
for k = 1:N
    V = ... whatever output or data you want to store
    C{k} = V; % basic indexing
end

See also:

https://www.mathworks.com/help/matlab/matlab_prog/preallocating-arrays.html

https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-cell-array.html

Do NOT number variable names like you show in your question, unless you really want to force yourself into writing slow, complex, inefficient code to process your data.

[wantinga]

Ok! Thanks for your answer! I will change the way to name the data.