Importing single and multiple files

Hello, I want to import single as well as multiple files, by first code i am able to import multiple files but if i select single file it shows error, please help me to get the result. I have done some changes in code 2 but still error is there.

 * * * * * * * * * * * * * * * |* *Item one**|*************** 
 if true
    [fileList, folder] = uigetfile('*.txt',...
'Find the File to Import', ...
'Multiselect', 'on')
for k = 1:length(fileList)
baseFileName = fileList{k}
fullFileName = fullfile(folder, baseFileName)
fprintf(1, 'Now reading %s\n', fullFileName)
  end

• * * * * * * * * * * * * * * * * * * * * * * * * * * * *Item two*****************************

if true
  [fileList, folder] = uigetfile('*.txt',...
'Find the File to Import', ...
'Multiselect', 'on')
for k = 1:length(fileList)
if k==1
  baseFileName = fileList
  fullFileName = fullfile(folder, baseFileName);
  fprintf(1, 'Now reading %s\n',fullFileName );
  raw_data = importdata(fullFileName)
  s = raw_data.data
else
   baseFileName = fileList{k}
   fullFileName = fullfile(folder, baseFileName);
   fprintf(1, 'Now reading %s\n',fullFileName );
   raw_data = importdata(fullFileName)
   s = raw_data.data
end
var = s(:,3)
s(:,3)= s(:,1)
s(:,1)= var
s = sortrows(s) 
end

Answer 1

[Jan]

[fileList, folder] = uigetfile('*.txt',...
                               'Find the File to Import', ...
                               'Multiselect', 'on');
fileList = cellstr(fileList);
for k = 1:length(fileList)
  ...

Now fileList is a cell string in all cases.

[Sandy Baha]

Thanks Jan and Ingrid for your valuable support

[Sandy Baha]

Jan, i have some text files which i will be importing and plotting the data. Data is in below format(shown in table below), i want to have plot between x and y keeping unique value same i.e.z data, it should display that unique value on graph for corresponding curve, means i want to plot between x axis = 100 200 300 and y =0.1 0.2 0.3 but there z value is 1 which will be as a text on plot. I have done something but not getting values for every curve, please help

if true
x     y     z   a
100   0.1   1   65
100   0.4   2   71
100   0.7   3   66
200   0.2   1   55
200   0.5   2   68
200   0.9   3   70
300   0.3   1   72
300   0.6   2   77
300   1.0   3   67

end

if true
[fileList, folder] = uigetfile('*.txt',...
                             'Find the File to Import', ...
                             'Multiselect', 'on');
fileList = cellstr(fileList);
for k = 1:length(fileList)
  baseFileName = fileList{k}
  fullFileName = fullfile(folder, baseFileName)
  fprintf(1, 'Now reading %s\n', fullFileName)

     raw_data = importdata(fullFileName)
     s = raw_data.data
     var = s(:,3)
     s(:,3)= s(:,1)
     s(:,1)= var
     s = sortrows(s) 
     E=unique(s(:,1))
     pos=[];
  for i=1:length(E)
    k=find(s==E(i));
    k=max(k)+i;
    pos=[pos;k]
end
 [r,c]       = size(s);
 add         = numel(pos);            % How much longer Anew is
 Anew        = NaN(r + add,c);        % Preallocate
 idx         = setdiff(1:r+add,pos);  % all positions of Anew except pos
 Anew(idx,:) = s; 
fclose('all')
     x=Anew(:,1);
     y=Anew(:,2);
     z=Anew(:,3);
     a=Anew(:,4);
hold on
figure(1)
plot(z,y,'*-','DisplayName',baseFileName);
hold all
for j = 1:length(E);
        text(z(j),y(j),num2str(E(j)))
end
legend('-DynamicLegend','Location','southwest');
xlabel('x');
ylabel('y');

end

Answer 2

[Ingrid]

is this what you try to achieve?

if true
  [fileList, folder] = uigetfile('*.txt',...
'Find the File to Import', ...
'Multiselect', 'on')
if length(fileList) == 1
  baseFileName = fileList
  fullFileName = fullfile(folder, baseFileName);
  fprintf(1, 'Now reading %s\n',fullFileName );
  raw_data = importdata(fullFileName)
  s = raw_data.data
else
for k = 1:length(fileList)
   baseFileName = fileList{k}
   fullFileName = fullfile(folder, baseFileName);
   fprintf(1, 'Now reading %s\n',fullFileName );
   raw_data = importdata(fullFileName)
   s{k} = raw_data.data
end
s = [s{:}];
end
var = s(:,3)
s(:,3)= s(:,1)
s(:,1)= var
s = sortrows(s)