MATLAB: To eliminate the lines begin with “%”

I have a file (attached here) which I need to eliminate all the lines begin with "%" and remove the "commas" after the numbers. Then read the numbers and put in separate columns X, Y and Z. Can anyone help me to make the program?

Best Answer

Hi!

Read in your file:

% read in a file
fid = fopen(FileName);
FC = textscan(fid, '%s', 'delimiter', '\n');
fclose(fid);
FC = FC{1};

You can get rid of all "%" lines if you compare the first char like:

FC = FC(~strncmp('%', FC, 1));

You can get rid of all ',' with a regex like:

FC = regexprep(FC, ',', '');

Afterwards you can parse your cell array FC line-by-line with sscanf to extract numbers.

Related Solutions

MATLAB: Loading vectors with multiple dimensions from a .txt file

Use fgetl() to read a line into a buffer. Use sscanf() to convert the line into numeric. Store in a cell array.

MATLAB: I want to translate MATLAB to fortran

For the fopen:

      INTEGER :: fid, fstatus
      fid = 10
      OPEN(UNIT = fid, FILE = filename, READONLY, ACCESS = 'READ',
     +     STATUS = 'OLD', IOSTAT = fstatus)
      IF (fstatus .NE. 0) THEN
        WRITE(*,*) 'Could not open file'
        CALL EXIT(0)
      END IF

for the ~ischar(line) I suspect that the context is to detect end of file. If so then with the above code having set up fstatus as the IOSTAT variable, right after you do the read of the line,

     IF (fstatus < 0) THEN
       EXIT     %exit loop
     END IF

for the sscanf, assuming that the result was assigned to INVAR, at some point in the program,

   REAL*8 :: INVAR(3)
   INTEGER :: I

and the sscanf would be

   READ( line, * ) (INVAR(I), I=1,3)

Best Answer

Related Solutions

MATLAB: Loading vectors with multiple dimensions from a .txt file

MATLAB: I want to translate MATLAB to fortran

Related Question