Import column from files

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Momo
Momo 2013-7-12
Hello,
I have 200 files with names starting from 3201.rad to 3396.rad, each files has header (5 lines of text), 1057 raw and 3 columns. I want to create a matrix with the second column of each file, without the header. Matrix with 1057 raw, 196 column.
Thank you in advance for your help!
M.

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回答（1 个）

Matt J
Matt J 2013-7-12
A=zeros(1507,196);
for i=3201:3396
filename=[num2str(i) '.raw'];
A(:,i) = dlmread(filename,'',[5,1,1511,1]);
end
  2 个评论
Momo
Momo 2013-7-12
Thank you Matt for your respons. However, it does not work. it gives me the message below
??? Error using ==> dlmread at 145 Mismatch between file and format string. Trouble reading number from file (row 1, field 5) ==> \n
I don't know how I can solve this problem. In details this is the data in files (4 columns, 1073 rows, 5 lines in header )
without numbers 1, 2, 3, 4, 5 in rows
  1. 3201.rad
  2. center 668.60 831.10 -> 668.14 832.82, r_max 1070.04
  3. radius binding according to
  4. 1 sectors on 360 degs with origin at -180.00 deg, 0.00 deg
  5. a I e/s n ...
  6. 0.0 102215.03 1915.55 4.6
  7. 1.0 105897.02 4812.49 9.9
  8. 2.0 108802.90 3875.25 16.4
  9. ....
  10. ..... # ......
  11. 1072.0 108802.90 3875.25 16.4
I have 196 files with this data, and I would like to tranfer only the 2nd column of all files to a matrix.
Thank you very much
Matt J
Matt J 2013-7-12
编辑：Matt J 2013-7-12
Works fine for me, Momo. What version of MATLAB are you using and are you sure you're calling DLMREAD with 3 input arguments, like in what I posted?
The error message says it's trying to read row 1, field 5. It should not be doing that if you've called it with the 3rd argument.

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