Shell Programming and Scripting

Hello guys,

I'm a new member here and I need some help with the Awk application. I'm using it through the Terminal app of OSX (I'm a Mac user).

I have a huge file with a large amount of data (rows of 3D cartesian coordinates). The data is typically like the following example (actually, the data is made of several thousands of "curves" defined by a list of points in 3D) :

I need Awk to read this input file, and write out the number of lines for each "curve" (with some arbitrary symbol in front of it), followed by a list of line numbers. From the data above, Awk should output something like this :

Take note that the first line is numbered as "0".
How can I do that ? Someone has an idea ?

The only data manipulation I know to do with Awk is like this example :

Thanks, and sorry for my bad English.

Try this:

Code:

awk '
{s=n?s " " c++:c++; n++}
/# End/{print "NumberOfLines " n; print s "\n"; n=0; s =""}
' file

Hi!!

Franklin 52, could you explain, your command line....i don't understand the part...

Code:

{s=n?s " " c++:c++;

Thanks by advance.

I've used a conditional operator, the form is :

Code:

expr ? action1 : action2

If expr is true, return action1 else return action2

Code:

s=n?s " " c++:c++

Explanation:

if n != 0 then s = s " " c++ else s = c++

Regards

Great, thanks...

OMG !! It worked like a charm !

THANK YOU SO MUCH !!!

Code:

awk '/End of/{
if(flag==0){
  flag=1
  print "NumberOfLines"NR
  for(i=1;i<=NR;i++){
    printf i-1" "
  }
  pre=NR
}
else{
  num=NR-pre
  print "NumberOfLines"num
  for(i=pre+1;i<=NR;i++){
    printf i-1" "
  }
  pre=NR
}
print ""
}'