Hi,
You may use the if and else block and "zeros" function to add the code for when the number of selected files is 0. zeros function creates an array and it can be converted into cell array using the num2cell function. I have added the additional code required for reference.
clear vector_t_sig simulink_matrix
m=input('how many folders/files you want to use? - ');
files=m;
signal_max=5;
simulink_matrix=cell(files,signal_max);
%% if else block
if files==0 %if number of files is 0, use the zeros function to generate required matrix of all 0's
simulink_matrix = num2cell(zeros(m,n)) %m,n denote the number of rows and column.
vector_t_sig = num2cell(zeros(m,n)) % num2cell function is used for converting numerical array to cell array
else
for i=1:files
[file,path] = uigetfile('MultiSelect','on');
if length(file)>signal_max
file_temp{1}=file;
file=file_temp;
end
for j=1:length(file)
load([path,file{j}])
for k=1:signal_max
if exist('y_inv_L')
position=1;
sig_temp=y_inv_L;
clear y_inv_L;
%and so on for the other possitios%
simulink_matrix{i,position}=sig_temp;
vector_t_sig{i,1}=t_sig;
