"I can't figure out what @(tbl) tbl is supposed to do , I didn't create neither a function or a variable with such a name, the script is working as expected though"
Yes, you did. Right there in that very code you defined a variable named tbl which is the input to an anonymous function**: https://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html
tmp = cellfun(@(tbl) tbl(:, cellstr(dataVariables(ct))), trainDataNormalized, 'UniformOutput', false);
% ^^^ you defined a variable named TBL right here.
That anonymous function then uses some other variables dataVariables(ct) (that already exist in the workspace) to get some values out of tbl (assuming that tbl is a table). Basically for every table in the cell array you access the same columns/variables.
Perhaps it would be clearer if you allocated that anonymous function to a function handle on another line:
fnh = @(tbl) tbl(:, cellstr(dataVariables(ct)));
tmp = cellfun(fnh, trainDataNormalized, 'UniformOutput', false);
Or you could replace it with a loop if you wish, something like this:
for k = 1:numel(trainDataNormalized)
tbl = trainDataNormalized{k};
tmp{k} = tbl(:, cellstr(dataVariables(ct)));
end
** Note that the function itself has no name. That is what anonymous means.
