# MATLAB: Convert files into matrix

multiple files

hi,
I have 177000 files, I have to create matrix contain all values in these files.
Each file was split using textscan to get
c{1},c{2},........
then convert it into matrix.
Then convert these matrices into one matrix.
the problem is these files contain some similar values, so I have to specify the similar values ,and drew all other attached values(row) with these values.
I tried running with 100 files to know running time , I found out the running time is very long for just 100 files.
I think if I find function can compare among c{1}for all files, and among c{2} for all files ,…etc . I think that will save time. I'm facing problem with this code:
targetdir = 'd:\social net\dataset\netflix\training_set';targetfiles = '*.txt';fileinfo = dir(fullfile(targetdir, targetfiles));k=0;arr(:,:)=0; inc=0;k=0;y=1;for i = 1: length(fileinfo)    thisfilename = fullfile(targetdir, fileinfo(i).name);    f=fopen(thisfilename,'r');  f1=fscanf(f,'%c'); f1(1:2)=[];     f2=fopen(thisfilename,'w');   fprintf(f2,'%c',f1);f3=fopen(thisfilename,'r');   c = textscan(f,'%f %f %s','Delimiter',',','headerLines',1);c1=c{1};c2=c{2}; c3=c{3};z=1;z1=1;z2=1;z3=0;for k=1+k:length(c1)+inc              no=c1(z); arr1=arr(:,1);  p=find(arr1==no);          if isempty(p)             j=1;      arr(y,j)=c1(z);  arr(y,j+1)=i;  arr(y,j+2)=c2(z);j=j+3;y=y+1;          else          ind(i,z1)=p;                  L=arr(p,:);len=0;                  for h=1:length(L)                      if L(h)~=0                          len=len+1;                      end                  end                  len;          arr(p,len+1)=i;          arr(p,len+2)=c2(z);          z1=z1+1;          end       z=z+1;       end      inc=inc+length(c1);    [u,u1] =size(arr);  end      f4=fopen('netfile.txt','w');  for i=1:u          for j=1:u1           fprintf(f4,'%d ',arr(i,j));          end          fprintf(f4,'\n');  end  fclose all;
thanks