How to assign values in multiple tables

Hi,

In my workspace i have like hundreds of tables. Each table is for different depth value that various from 0 to 1000 in steps of 10. So what i want to do is i want to create 4 more columns in each table. For Example the column header name will be K, A, D ,S. And like the values of K, A, D and S is same for depths 0 to 200 and 210 to 500 its different values (but constant) and from 500 to 1000 its different but constant. How can i do this for all the tables by writing a small programme. I am attaching sample table files. Any help will be appreciated. Thanks in advance.

[Stephen23]

"In my workspace i have like hundreds of tables."

That is the main problem.

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

When you import your data, allocate them to one array (e.g. cell array, table, structure, etc) using indexing (simple and efficient) or fieldnames. Then your task is trivial with one simple loop.

[Peter Perkins]

You attached files, which suggests that maybe you have hundreds of files. If that's the case, then write a loop to read them into elements of a cell array, something like

c = cell(1,n);
for i = 1:n
    c{i} = readtable('filename_i');
end

and then you at least have a chance.

So the three files you posted seem nothing like you description; they all have timestamps, and a constant depth value in each one. You need to explain more clearly what you want to do, with a small example.