How to concatenate multiple text files in a single matrix

Hi all,

I'm trying to concatenate multiple text files in a single matrix and process it together (example files are attached).

I'm using the following code:

[filename, pathname] = uigetfile('*.txt','MultiSelect','on');

filepath = fullfile(pathname,filename);

filepath = string(filepath);

numfiles = length(filepath);

data = [];

tab=[];

for k = 1:numfiles

tab = readtable(filepath(k));

if k == 1

data = table2array(tab);

else

data = cat(numfiles, data, table2array(tab));

end

end

It works with 1 and 2 files but when I select 3 files together it gives me the following error message:

Error using cat

Dimensions of arrays being concatenated are not consistent.

Error in readtxt5 (line 300)

data = cat(numfiles, data, table2array(tab));

Can anyone help me understand how to modify it to include 2+ files? Thanks

Answer 1

[Benjamin Thompson]

The third file does not have as many columns as the first two. Table concatenation requires a consistent number of variables to expand the table.