How to skip the first line from text file?

I have this multi-import file, which ask user to importchose text and csv file. My text file columns information on the first row and I want to skip the first line. Any help would be much appreciated.

Sincerely

siva

clear
  clc
  [fileName,filePath] = uigetfile({'*.csv';'*.txt'},'Pick a file','MultiSelect','on'); %filePath is were the folder address is stored
  if isnumeric(fileName);                             %fileName is were the file address stored
      disp('Please pick multiple file');
      return; 
  end
  pathToFile = fullfile(filePath,fileName);           % getting file name and folder name
  x= size(pathToFile,2);                              % size of the pathToFile

disp('Stress and strain column in csv format are as follows: 8 & 7');
disp('Stress and strain column in txt format are as follows: 4 & 5');
prompt ='Please choose the Stress column from csv format';
stress_column_csv =input(prompt);
prompt ='Please choose the strain column from csv format';
strain_column_csv=input(prompt);

prompt ='Please choose the Stress column from txt format';
stress_column_txt=input(prompt);
prompt ='Please choose the strain column from txt format';
strain_column_txt=input(prompt);

for i=1:x
[pathstr, name, ext{i}] = fileparts(pathToFile{i});         %had to add this line to get the file extension
store = importdata(pathToFile{i});

if ext{i} == '.csv'
[val,idx] = max(store.data(:,strain_column_csv));          % finding the max value
c ={idx};                                                  % idx contain cell value. 
stress{i}=store.data(1:c{1},stress_column_csv);
strain{i} =store.data(1:c{1},strain_column_csv);
else if ext{i}=='.txt'
% [val,idx] = max(store(:,stress_column_txt));
% c ={idx};
stress{i}=store(:,stress_column_txt);
strain{i} =store(:,strain_column_txt);
    end
    end
end

title_name=input('Title? ','s')
cc=jet(x);  

for i=1:x
    figure(1)
    plot(strain{i},stress{i});
    hold on
    legendInfo{i}=[fileName{i}];
end
legend(legendInfo)
xlabel('strain [%]');
ylabel('Stress [MPa]');
grid on;
title(title_name);

[dpb]

Probably be simpler if you showed a sample of the file(s) you're trying to read and what you want read. Not sure why there's any need for the discernment between .csv/.txt; seeing the file(s) would answer what the issues are.

importdata infers header rows automagically as well as delimiters or you can use the optional input parameters to give it some help in that regard.

Again, seeing the actual files would undoubtedly let someone simplify your script immensely.

[Image Analyst]

Like dpb says, importdata() may well work. csvread() might also work if you have a later version of MATLAB. If you can't get either of those to work, then attach your data file.

[Walter Roberson]

One small thing to watch out for in the newest couple of releases is that importdata now defaults to importing text as string objects instead of as cell arrays of character vectors.

Another approach to consider is using readtable()

[dpb]

I just commented on importdata behavior as that was what OP is using but going through what seems like excessive gyrations to do so.

Alternatives are surely possible if we knew the file format, specifically, readtable certainly being a newer member of the family that has features to commend it.

OTOH, wonder how many scripts are broken by a change in return characteristics or is the string class really interchangeable with cellstr???

[Walter Roberson]

I have seen a couple of scripts broken because of the change -- but so far in each case it was because the scripts themselves already had bugs in how they handled the data.

[sivalogan satchithanandamoorthy]

I have multiple file. Some are text file while other are csv files. The problem is first line from text file contain heading and same thing with csv but matlab ignore first line from csv not from text. so how can i write a script, so it will automatically skip the first line from the text file using my script?

[Walter Roberson]

How are you reading in the text files? How are you reading in the csv files?

[sivalogan satchithanandamoorthy]

did not see your question until now. I do not get notification, if someone ask a question. I only get if for answer. Any way you would have found it by now, answer for the question above since you have answered my question.

Answer 1

[Walter Roberson]

[pathstr, name, ext{i}] = fileparts(pathToFile{i});         %had to add this line to get the file extension
if strcmp(ext{i}, 'txt')
   store = importdata(pathToFile{i}, ',', 1);              %I am guessing about the delimiter
else
   store = importdata(pathToFile{i});
end

[sivalogan satchithanandamoorthy]

Thank, it works

[sivalogan satchithanandamoorthy]

I have different script, which only contain text file only. so i used comment to skip the first line but, matlab store only the first line. Not sure what happening? I have delimiter as space. Any help please?

store = importdata(pathToFile{i}, ' ', 1);

[Walter Roberson]

When I test with a text file that has numeric data separated by spaces, importdata() automatically figures out that there is a header line.

Please post the first couple of lines of one of your files for testing. Also, which release are you using?

[sivalogan satchithanandamoorthy]

I am using 2017a. First couple of line

[Walter Roberson]

store = importdata(pathToFile{i})

alone should work on those files.

[sivalogan satchithanandamoorthy]

yea man it does, thanks