Creating a vector of tables

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Calum Henderson
Calum Henderson on 7 Oct 2020
Commented: madhan ravi on 8 Oct 2020
I currently have a script that loops through a number of '.csv' files in a directory and creates a table with the data from each file:
directory = dir(dirname);
filenames = {directory(:).name}';
csvfiles = filenames(endsWith(filenames,'.csv'));
for i = 1:length(csvfiles)
file = [char(dirname) '/' char(csvfiles(i))];
CTLdata = readmatrix(file);
table = array2table(CTLdata,...
'VariableNames',{'Current','Voltage','Resistance'});
end
It reads the files correclty, but my issue is that only the final table is saved for use. I would like to produce a "vector of tables" of sorts, and I have tried:
tables(i) = table
among other things but I have had no luck.
What is the best way for me to save the info from each file in a separate table?
  1 Comment
Stephen23
Stephen23 on 7 Oct 2020
Edited: Stephen23 on 7 Oct 2020
Rather than getting all directory contents and filtering them afterwards, it is simpler to just get the required files in the first place:
S = dir(fullfile(dirname,'*.csv'));
csvfiles = {S.name};
You should be using fullfile instead of concatenating strings together (I fixed the cell indexing too):
file = fullfile(dirname,csvfiles{i});
And the answer to your qusetion is to use a cell array, just the the documentation recommends:

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Accepted Answer

Ameer Hamza
Ameer Hamza on 7 Oct 2020
Tables cannot be combined in a simple array. You need a cell array
directory = dir(dirname);
filenames = {directory(:).name}';
csvfiles = filenames(endsWith(filenames,'.csv'));
tables = cell(size(csvfiles))
for i = 1:length(csvfiles)
file = [char(dirname) '/' char(csvfiles(i))];
CTLdata = readmatrix(file);
table = array2table(CTLdata,...
'VariableNames',{'Current','Voltage','Resistance'});
tables{i} = table;
end
  3 Comments
madhan ravi
madhan ravi on 8 Oct 2020
Naming a variable table will shadow the inbuilt function.

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