how to import repeating block data of text file in MATLAB?

Hi,

i have a few datasets need to be processed, but i dont know how to import them to the matlab since I am a biginner of MATLAB. The data looks like this:

0126
NANO0840 2011-07-15 12:11:29 12.1v INL  39.0%  40.0 DegC
OPER       L.Z TX ID     1 A-SP    100  M
JOB   001 LINE        1 N  SPREAD  1
 50% RxM    250 TxX   20 TxY   20 #T  1
Tx Delay  1.5 Antenna Delay    2 Alias IN 
Robust None         Window  ZONGE
1  NanoTEM   A/D 16-bit    S/N   64 Passed 1.00000
Front Panel S/N   56, Cal S/N  172, Temp  40.0, Humidity  39.0, EPROM BD387 0840

0127
NANO0840 2011-07-15 12:13:14 12.1v INL  39.0%  40.0 DegC
Tx        1 Rx        1 N   OUT
  64 Hz    128 Cyc Tx Curr     3 4.819u    1u  1.606u
1  Hz      1  222.94u  80.23u  24.82   000O 62.23u    0.00     0 
  Wn     Mag 1    Rho 1  
 0.319u  1.5825   674.98 
 1.925u  0.4227   81.201 
 3.531u  0.1736   53.453 
 5.137u  90.065m  44.321 
 6.743u  53.728m  39.743 
 8.350u  34.973m  37.061 
 10.73u  21.064m  34.221 
 13.95u  11.979m  32.190 
 17.16u  7.5831m  30.896 
 21.14u  4.8296m  29.500 
 25.97u  3.1097m  28.075 
 32.28u  1.9126m  27.009 
 41.08u  1.1106m  25.968 
 51.49u  659.11u  25.235 
 64.24u  376.08u  25.367 
 80.23u  222.94u  24.824 
 100.9u  110.88u  26.994 
 128.0u  66.548u  25.512 
 161.6u  30.614u  29.035 
 203.1u  12.955u  35.197 
 255.0u  11.043u  26.791 
 321.0u  10.813u  18.504 
 404.9u  13.808u  10.678 
 508.7u -0.9989u  42.045 
 639.4u  4.7662u  10.133 
 805.4u  5.4792u  6.2862 
 1.014m  2.5061u  7.2169 
 1.276m  2.7276u  4.6476 
 1.607m  0.0791u  33.511 
 2.022m  1.8926u  2.7528 
 2.547m  2.7681u  1.4547

except of block 126, the other blocks are the same.each block i am able to use the textscan to import one block of data, but have no idea how to import all of these data in one time. Anybody would like to give a hand?

Thanks a lot.

[Walter Roberson]

Are there always exactly 31 lines of Wn / Mag / Rho data?

[Lei]

yes, Each block has 6 headerlines, 3 colums and 31 rows except the very first block. The first block has 9 header lines without numerics. and for all of the blocks,there's one space.

I used the fid=fopen('filename');

C=textscan(fid,'%*d %*d %*d %*d %*s %f %*d %f %f %f %f %f','headerlines',9);

a=cell2mat(C) to get one block data.

My big problem is that i dont know which function should i use or do i need to write a loop and how. Thank you so mych

Answer 1

[Walter Roberson]

fid = fopen('filename');
textscan(fid, '', 1, 'headerlines', 10);  %skip entire block
C = {};
while true
  thisblock = textscan('%f%*c%f%*c%f', 31, 'headerlines', 6, 'CollectOutput', 1);
  if all(cellfun(@isempty,thisblock)); end; break;  %end of file
  C{end+1} = thisblock{1};
end

Warning: this ignores the 'u' and 'm' suffixes. You have not given any indication of how you want to handle those.

This code will produce one cell array in C per block read in.

This code makes no attempt to read anything out of the first block.

This code makes no attempt to read the block number or any other header.