How to import a txt file into matlab?

Hi,guys.I have to write a code that reads a .dat file which contains weather stats for NYC.I' ve used -load file_name.txt- function but got an error.I also have to rearrange that dat file and save that new file as another dat file.Thanks

[Debashis Panda]

Hello I have opened .dat file written in .txt format.Here is my code for your reference answer = char(inputdlg('enter name of file (without .daa suffix)','Filename',1)); q = 'Yes'; if ~isempty(answer) if exist([answer '.txt'],'file') q = questdlg(['The file ',answer,'.txt already exists. Do you want to overwrite it?'],'Overwrite file','Yes','No','No'); end p1=dlmread([answer,'.dat'],'w');%p1 is the open file name try this... wish u all the best

[Star Strider]

It would help if you attach the file so we can work with it.

Use the ‘paperclip’ icon to upload the file to your original Question (use the ‘Edit’ option first) or to a new Comment here.

[absomnia48]

Hi,I've worked on this but couldn' figure out again.Here's what I've done so far.And this is the file.Thank you for your help.

 Title_1='NYCtemp datas';
Years={'1971';'1972';'1973';'1974';'1975'};
Months={'year' , 'jan' , 'feb'  , 'mar'  , 'apr'  , 'may'  , 'jun'  ,  'jul' , 'aug' ,  'sep ' , 'oct' ,  'nov',   'dec'}
Data= [27.0  35.1  40.1  50.8  61.4  74.2  77.8  75.9  71.6  62.7  45.1  40.8
      35.1  31.4  39.8  50.1  63.3  67.9  77.2  75.6  69.5  53.5  44.4  38.5
      35.5  32.5  46.4  53.4  59.5  73.4  77.4  77.6  69.5  60.2  48.3  39.0
      35.3  31.7  42.1  55.2  61.0  69.0  77.2  76.4  66.7  54.1  48.2  39.4
      37.3  35.8  40.2  47.9  65.8  70.5  75.8  74.4  64.2  59.2  52.3  34.9];
  fid=fopen('NYCtemp.dat','w+t');
  if (fid<0)
      fprintf('Error opening file \n');
      return;
  end
  fprintf(fid,'%s\n',Title_1);
  fprintf(fid,'%s',Months)
  for ii=1:5
      fprintf(fid,'%5s',Years{ii})
      fprintf(fid,'%5.2f,%5.2f,%5.2f,%5.2f,%5.2f,%5.2f,%5.2f,%5.2f,%5.2f,%5.2f,%5.2f,%5.2f',Data{ii,:})
  end

[Star Strider]

The ‘.dat’ file seems to be what you were having problems with. You have (apparently copied and pasted) the data in the ‘NYCtemp.txt’ file into your code.

What specifically do you want help with? If you need help with the ‘.dat’ file, please attach it and tell us what you want to do with it.

[absomnia48]

http://www.mathworks.com/matlabcentral/answers/uploaded_files/66514/NYCtemp.txt

This is the file I have to work with.I have to create a .dat file in Matlab exacly like this txt file.Then I have to rearrange the file so that months run vertically and years run horizantally.The code I wrote above is for the first part of my problem.(creating the .dat file).Thank you.

Answer 1

[John D'Errico]

So learn to use one of the many tools to read a file. Start with textread, or more basic tools like fopen, fread. Then learn about how to save a file. Again, lots of tools, starting with save.

We don't do your work for you though. That is your job. Anyway, you have not asked a clear question that tells anybody anything about the file, or what error you got. So we cannot possibly help you more here. The crystal ball is so foggy today that we cannot see into your mind or your computer.