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matching pattern to end of line

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# 1  
Old 07-25-2012
matching pattern to end of line
I have the following code and want to get only the comments.

Ideally I would like to replace the characters to the left of the first '!' in the line with blanks.

Code:
 
  real, dimension(:), allocatable :: ft  ! stores a single trace
  real, dimension(:), allocatable :: tr  ! stores a single trace (extended to size of ft)
                                                            
  nt = size(tcube,1)
  nx = size(tcube,2)
  ny = size(tcube,3)
  nf = size(fcube,1)

  ! trace in the frequency domain
  allocate( ft(nf) )

  ! trace extended to size(ft)
  allocate( tr(nf) )

Output would be as follows.

Code:
 
                                         ! stores a single trace
                                         ! stores a single trace (extended to size of ft)
  ! trace in the frequency domain
  ! trace extended to size(ft)

Last edited by kristinu; 07-25-2012 at 07:08 AM..
# 2  
Old 07-25-2012
Before we start finding you a solution, would you mind providing a sample of the desired output file?
# 3  
Old 07-25-2012
Hi

Code:
grep '!' infile | sed 's/.*!/!/'

# 4  
Old 07-25-2012
Quote:
Originally Posted by Chirel
Hi

Code:
grep '!' infile | sed 's/.*!/!/'

Tried
Code:
  grep "!" radon3d_subs.f90 | sed 's/.*!//'

but am getting
Code:
//: Event not found.

# 5  
Old 07-25-2012
Code:
awk '/!/{gsub(/./," ",$1); print }' OFS=! FS=! infile

# 6  
Old 07-25-2012
Got an error using the following

Code:
grep '!' radon3d_subs.f90 | sed 's/.*!/!/'
/!/: Event not found.

---------- Post updated at 05:34 AM ---------- Previous update was at 05:32 AM ----------

Quote:
Originally Posted by ripat
Code:
awk '/!/{gsub(/./," ",$1); print }' OFS=! FS=! infile

The command gives an error

Code:
awk '/{gsub(/./," ",$1); print }' OFS=! FS=! radon3d_subs.f90
awk: fatal: Unmatched ( or \(: /{gsub(/

---------- Post updated at 05:39 AM ---------- Previous update was at 05:34 AM ----------

Seems that the 'Event not found' error is from the csh shell. Unfortunately on this machine I have to use csh, so I escape the !.
# 7  
Old 07-25-2012
Quote:
Originally Posted by kristinu
Code:
awk '/{gsub(/./," ",$1); print }' OFS=! FS=! radon3d_subs.f90
awk: fatal: Unmatched ( or \(: /{gsub(/

Is not what I have posted. You must filter the output with /!/
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