how to read a file in matrix format?

am having a following file and i used "fscanf" to read the file in matrix format,but it will display the value after some calculation... the content could be changed?

also how to read a multiple file with in a folder in matrix format????????

Answer 1

[Purushottama Rao]

fid=fopen('11_20114111611_logfile.txt','r')
k=textscan(fid,'%d%d%d%d')
cell2mat (k)

[suganya s]

ya i use this also but it will show error as invalid file identifier? how can i proceed?

[Purushottama Rao]

In my opinion, ypu should not get 'invalid file identifier' with fopen command. fopen returns -1 if file open is failed. Can you give the screen shot after typing the first command?

[Purushottama Rao]

Its working for me...

>> fid=fopen('11_20114111611_logfile.txt','r')

fid =

     5

[suganya s]

yes sir,fid return -1,then how can i proceed

[suganya s]

here the screen shot then tell me what is the problem how can read a file

[suganya s]

i get this ans now..how can i read filder

[Purushottama Rao]

Is the current folder consists the file '11_20114111611_logfile.txt'??

[suganya s]

yes the folder consists of the above file 20 more file

[Purushottama Rao]

Iam confuesd a bit. Could you able to read the data in one file into a matrix??

[suganya s]

yes i read one file...........any for loop we use?

[suganya s]

any for loop want to use to read a folder?

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

[suganya s]

if we use dir command in matlab then can i read the folder?????

[Walter Roberson]

dinfo = dir('*.txt');
for K = 1 : length(dinfo)
  thisfile = dinfo(K).name;
  fid = fopen(thisfile, 'rt');
  datacell = textscan(fid, '%d%d%d%d', 'CollectOutput', 1);
  fclose(fid);
  logdata(K).filename = thisfile;
  logdata(K).data = datacell{1};
end

Now logdata will be a structure with one entry for every file, with fields "filename" and "data".

You cannot do it in "2 3 steps". You need at least 4 steps: getting the file names, looping over the names, opening each file, reading the data from the file.

Answer 2

[suganya s]

how to read file in matrix format?????

am having the following file i want read the file in matrix format. i used fscanf command but the file content was changed.......

Answer 3

[Walter Roberson]

Your data was not changed. You need to use the command

format long g

to see the data in the form you would like. Currently you are using

format short

which requests a compact view that reduces the number of displayed decimal places in order to reduce the amount of output.

To read multiple files see

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Answer 4

[suganya s]

how can i read a entire folder within 2 3 steps?????

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F