Delete line of file based on number in first column

I'm trying to delete lines in a file based on a number in the first "column" of the file. The file(s) looks something like:

 8 Job          Operator      Date           Time             Instrument
 8 15899-2016   THP/KVE       16-08-11       08:13:09         1626136   
 8
 8 PT          Code             y             X             Z
 6 CKOTE1       250     137827.548     98704.895        32.880  
 6 CKOTE2       250     137828.245     98707.396        32.880  
 6 CKOTE3       250     137830.581     98711.226        32.880  
 8 CKOTE4       250     137833.055     98713.677        32.879

So my questions is how i tell matlab to skip lines containing the char "8" in the first column, so I get the remaining data:

 6 CKOTE1       250     137827.548     98704.895        32.880  
 6 CKOTE2       250     137828.245     98707.396        32.880  
 6 CKOTE3       250     137830.581     98711.226        32.880

Thanks

Answer 1

[Azzi Abdelmalek]

fid=fopen('file.txt');
l1=strtrim(fgetl(fid));
out={};
while ischar(l1)
  l2=strtrim(l1);
  if l2(1)~='8'
      out{end+1,1}=l1;
  end
  l1=fgetl(fid);
end
out

[Henrik Larsen]

I don't know if I need to make a new question, anyway here goes:

I can't make it work if forexample i just make an empty line like this:

 8 Job          Operator      Date           Time             Instrument
 8 15899-2016   THP/KVE       16-08-11       08:13:09         1626136   

 8 PT          Code             y             X             Z
 6 CKOTE1       250     137827.548     98704.895        32.880  
 6 CKOTE2       250     137828.245     98707.396        32.880  
 6 CKOTE3       250     137830.581     98711.226        32.880  
 8 CKOTE4       250     137833.055     98713.677        32.879

This will just give me an out of bound error, I have tried to work it out myself but I just can get it to work.

Any suggestions?

[arvind ramasamy]

I make a serial communication with an arduino and get the data of accelerometer mag and gyro values my data comes in as a string. 's' is the object i created for serial communication

data =fscanf(s,%s) % gives me the data from the arduino

i want my vector size to be 500. so when I run it in for loop

for i= 1:50

data =fscanf(s,'%s');

end

my output is: data = initializationsuccesful!

data = ax:123ay:23az:1234gx:23gy:50gz:43mx:23my:123mz:234

and goes on.

I use,

A_x(:,i) = str2num(data(:,4:8))

to get my vector. but since 'initializationsuccessful!' is not a number i am unable to form my vector. so how can I do it ???? this is my question