How to import a file using only part of the name, such as an index at the begin of filename?

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INTRO Hi, I have multiple text files named as below:
C:\Users\EMERSON\Desktop\1\1_2013-01-21__15-35-22.txt
C:\Users\EMERSON\Desktop\1\2_2013-01-21__15-35-23.txt
C:\Users\EMERSON\Desktop\1\3_2013-01-21__15-35-24.txt
C:\Users\EMERSON\Desktop\1\4_2013-01-21__15-35-25.txt
C:\Users\EMERSON\Desktop\1\5_2013-01-21__15-35-26.txt
C:\Users\EMERSON\Desktop\1\6_2013-01-21__15-35-27.txt
C:\Users\EMERSON\Desktop\1\7_2013-01-21__15-35-28.txt
The file name is made of three components: i) index k=1:arbitrary, ii) date, iii)hour.
And I want to import/load these files using only the first index (1,2,3,4,5,6,7). So I wrote:
for k = 1:1;
fid =fopen(['C:\Users\EMERSON\Desktop\1\',num2str(k),'~.txt']);
A=textscan(fid,'%f %f %f %f %f %f ');
fclose(fid);
end
For instance I use k=1:1 only to test if one file is imported correctly, later k=1:arbitrary.
Problem: I obtain the following error:
Error using textscan
Invalid file identifier. Use fopen to generate a valid file identifier.
I wonder if someone could tell me how to correct the first command line (fid=fopen....).
Thank you in advance for your attention
Emerson

Accepted Answer

Walter Roberson
Walter Roberson on 21 Jan 2013
  5 Comments

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