Question

noLinesGPS = 8;

noLinesGLONASS = 4;

noLinesGALILEO = 8;

noLinesBEIDOU = 8;

n = 0;

while n == 0

txtLine = fgetl(fid_temp);

if (txtLine == -1)

break;

end

if (isempty(txtLine))== 1

break;

end

if (txtLine(1) == 'G')

dataGPS = txtLine;

for nLine = 1:noLinesGPS

txtLine = fgetl(fid_temp);

dataGPS = sprintf('%s %s', dataGPS, txtLine);

end

elseif (txtLine(1) == 'R')

dataGLONASS = txtLine;

for nLine = 1:noLinesGLONASS

txtLine = fgetl(fid_temp);

dataGLONASS = sprintf('%s %s', dataGLONASS, txtLine);

end

elseif (txtLine(1) == 'E')

dataGALILEO{idxGALILEO} = txtLine;

for nLine = 1:noLinesGALILEO

txtLine = fgetl(fid_temp);

dataGALILEO = sprintf('%s %s', dataGALILEO, txtLine);

end

%idxGALILEO = idxGALILEO + 1;

elseif (txtLine(1) == 'C')

dataBEIDOU = txtLine;

for nLine = 1:noLinesBEIDOU

txtLine = fgetl(fid_temp);

dataBEIDOU = sprintf('%s %s', dataBEIDOU, txtLine);

end

end

n = 1;

end

See the loop copiedied in above. I have a series of loops starting at line 112. Only the first loop is processing. I know this because when I debug the code only dataGPS shows up in my workspace. I need the program to read a RINEX file and sort it by GPS constellation so after GPS I need the program to check for GLONASS, Galileo and Beidou constellations. Right now the loop to check for gps is the only one processing. Could you please show me the proper syntax to allow each loop to run?

Answer 1

noLinesGPS = 8;
noLinesGLONASS = 4;
noLinesGALILEO = 8;
noLinesBEIDOU = 8;

% infinite loop that continues, till the end of file is reached or an empty line is encountered in the file
while 1

   txtLine = fgetl(fid_temp); % read a line from file
  
   % end of file is reached, exit the loop
   if (txtLine == -1)
       break;
   end

   % empty line, exit the loop
   if ((isempty(txtLine))== 1)
       break;
   end
  
   if (txtLine(1) == 'G')
       dataGPS = txtLine;
       for nLine = 1:noLinesGPS
           txtLine = fgetl(fid_temp);
           dataGPS = sprintf('%s %s', dataGPS, txtLine);
       end
   elseif (txtLine(1) == 'R')
       dataGLONASS = txtLine;
       for nLine = 1:noLinesGLONASS
           txtLine = fgetl(fid_temp);
           dataGLONASS = sprintf('%s %s', dataGLONASS, txtLine);
       end  
   elseif (txtLine(1) == 'E')
       dataGALILEO{idxGALILEO} = txtLine;
       for nLine = 1:noLinesGALILEO
           txtLine = fgetl(fid_temp);
           dataGALILEO = sprintf('%s %s', dataGALILEO, txtLine);
       end  
   %idxGALILEO = idxGALILEO + 1;
   elseif (txtLine(1) == 'C')
       dataBEIDOU = txtLine;
       for nLine = 1:noLinesBEIDOU
           txtLine = fgetl(fid_temp);
           dataBEIDOU = sprintf('%s %s', dataBEIDOU, txtLine);
       end

   end

end