Open multiple file as string

Hi guys,

I have a question.

I have different file like string, and I want to open it togheter, without write the name

I tryd this code, but in this way I have to write the name of single file.

Have you advice about it?

directory='D:\Documents\numeric\pip\';
fittingresultspath = 'D:\Documents\numeric\fitting_results\pip\';

fid = -1; msg = ''; while fid < 0
    disp(msg); filename = input('input: ','s'); fid=1;
end

Thank you so much

[Geoff Hayes]

FC - do you want to keep prompting the user for a file (to read) until the file can be opened?

msg = ''; 
while fid < 0
    disp(msg); 
    filename = input('input: ','s'); 
    fid=fopen(filename, 'r');
end

% do something with the file

% close the file
fclose(fid);

[Fredic]

Thank you so much for your answer.

I have a series of files like string and I have to open them to run them in my code.

How can I open them all together?

I don't want to call them one by one, but given the folder I want to open them automatically, being so many files.

[Geoff Hayes]

FC - you'll need to open the files one by one possibly with a loop. I don't understand why you'd want to open them all at once. Also, what do you mean by series of files like string?

[Fredic]

my problem is to be able to read even with a loop for a series of files "s" string. I can't do that.

[Geoff Hayes]

I'm not really sure what you mean by for a series of files "s" string. What happens when you try something like

while true
    filename = input('please input a file name: ','s'); 
    fid=fopen(filename, 'r');
    if fid > 0
        % do something with file
        
        % close file
        fclose(fid);
    else
        fprintf('Could not open file %s\n', filename);
    end
    
    response = input('Are you finished (Y/N): ','s'); 
    if strcmpi(response,'Y')
        break;
    end
end

[Fredic]

It is appeared in the command windows:

----

please input a file name: Ra25721_minor_op_

Could not open file Ra25721_minor_op_

Are you finished (Y/N):

----

appeared my results of analysis.

If I want consider the files automatically, without that I have to write the name?

[Geoff Hayes]

Are all of the files in the same folder (see dir)? Different folders? Do you want the user to choose the file (see uigetfile)?

[Fredic]

The files are in the same folder and I want to consider all the files and not choose individual files.

Answer 1

[Geoff Hayes]

FC - try the following

folderName = '/Users/somename/somepath'; % example folder that has files we are interested in
filesInFolder= dir(folderName);
for k = 1:length(filesInFolder)
   fprintf('file name: %s\n',filesInFolder(k).name);
   % do something with this file
end

[Fredic]

thank you so much for your answer.

Now appear this message:

Error using horzcat

The following error occurred converting from char to struct: Conversion to struct from char is not possible.

Do you have any advice??

[Walter Roberson]

What is your current code?

[Fredic]

I have different file like string, and I want to open it togheter, without write the name

I tryd this code, but in this way I have to write the name of single file.

directory='D:\Documents\numeric\pip\';
fittingresultspath = 'D:\Documents\numeric\fitting_results\pip\';
fid = -1; 
msg = ''; 
while fid < 0
    disp(msg); 
    filename = input('input: ','s'); 
    fid=1;
end

it is working very well, but in this way I have to write each single file to run my code.

[Geoff Hayes]

FC - but the above code doesn't throw the horzcat error...and it looks like the code that you have originally posted. Please show the code that you are trying to use which is causing the error.

[Fredic]

directory='D:\Documents\numeric\pip\';
fittingresultspath = 'D:\Documents\numeric\fitting_results\pip\';

fid = -1; msg = ''; while fid < 0
    disp(msg); filename = input('input: ','s'); fid=1;
end
%%
angle = directory;
%% ------------------------------------------------------------------------
while reinisch_in_plane + gasser_2006 + reinisch_out_of_plane ~= 1
    fprintf('ERROR: choose ONE model for fitting!')
    break
end
% read and adjust data
rawdata = dlmread([angle,filename]);
size_rawdata = size(rawdata);

[Geoff Hayes]

The while loop is unnecessary since you don't actually try to open the file in the body of the loop. This code can be replaced with just

 filename = input('input: ','s');

The msg and fid are not used (or don't add anything to the code). I'm assuming that concatenation error is coming from

[angle,filename]

but this seems to work okay for me (though I would recommend using fullfile to build the full file name and path from the two inputs. Also, the variable angle seems incorrectly named for the purpose here.

I think that you need to use the MATLAB debugger to see what angle is and what filename is. Perhaps one or both is being overwritten in your while loop (I'm guessing that you've omitted some code)

while reinisch_in_plane + gasser_2006 + reinisch_out_of_plane ~= 1
    fprintf('ERROR: choose ONE model for fitting!')
    break
end

[Fredic]

thanks!!

[Fredic]

"Accept this answer at the top of the answer to actually accept it." It does not appers this possibility