How to import multiple indexed .txt files using a loop?

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Emerson De Souza
Emerson De Souza on 10 Jan 2012
MOTIVATION: I want to: a) create, b)save and c) import .txt-tables using an index i within a loop.
EXAMPLE:
To create and save .txt-tables I wrote (for example) the following command lines:
for i=1:5;
V{i}=i-10:i:i+10;
fid = fopen(sprintf('Q_%d.txt',i),'wt');
fprintf(fid, [repmat('%g\t', 1, size(V{i},2)-1) '%g\n'], V{i}.');
fclose(fid);
end;
PROBLEM:
Now I want to import the Q_index.txt files also using a loop, such as:
for j=1:5;
fid =fopen(sprintf('Q_%d.txt',j),'wt');
QIMPORTED{j}=textscan(fid,'%f','TreatAsEmpty','NA','EmptyValue',NaN);
fclose(fid);
end;
but I obtain only empty cells.
QUESTION: I wonder if someone knows how to import multiple text files such as TABLE_index.txt using at once
using a loop command.
Thank you in advance for your attention
Emerson

Accepted Answer

TAB
TAB on 10 Jan 2012
While reading the file, you are opening the file again in 'write mode'. This will empty the files.
Use 'r' instead of 'wt' when you are opening the file to for reading.
fid =fopen(sprintf('Q_%d.txt',j),'r');
QIMPORTED{j}=textscan(fid,'%f','TreatAsEmpty','NA','EmptyValue',NaN);
  1 Comment
Emerson De Souza
Emerson De Souza on 10 Jan 2012
Tabrez
Thank you a lot for your suggestion.
wish you a nice day
Emerson

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