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# 1  
Old 09-18-2013
Question Grep command


I have a file which looks like this
C       Pos           Ref     BestGen BestQual  A+-     B+-     SP      CV
6       108858301       T       TT      ?2      +-      +-      TT      TT
6       108858304       C       CC      ?2      +       +       CC      CC
6       108858309       C       CC      ?3      +       +       CC      CC
6       108858312       C       CC      ?1      +       +       CC      CC
6       108858313       T       TT              +       +       TT      TT
6       108858315       T       TT      ?2      +       +       TT      TT
6       108858316       C       CC      ?2      +-      +-      CC      CC
6       108858317       T       TT      ?6      +       +       TT      TT
6       108858318       T       TT      ?2      +-      +-      TT      TT
6       108858321       T       TT      ?4      +-      +-      TT      TT
6       108858322       C       CC      ?8      +       +       CC      CC
6       108858325       T       TT              +-      +-      TT      TT
6       108858326       T       TT              +       +       TT      TT
6       108858328       A       AA      ?5      +       +       AA      AA
6       108858330       T       TT      ?6      +-      +-      TT      TT

I need to remove from the file all the lines which contain "?2" to "?8"

I tried using
grep -v '?2' '?3' '?4' '?5''?6' '?7' '?8'  filename > output

but I get an error
grep: ?3: No such file or directory
grep: ?4: No such file or directory
grep: ?5?6: No such file or directory
grep: ?7: No such file or directory
grep: ?8: No such file or directory

Any help is appreciated. Thank you
# 2  
Old 09-18-2013
try this:
grep -v '\?[0-9]' filename

If this is not what you wanted, post the output as well.
# 3  
Old 09-18-2013
The output should be something like this

C       Pos           Ref     BestGen BestQual  A+-     B+-     SP      CV
6       108858312       C       CC      ?1      +       +       CC      CC
6       108858313       T       TT              +       +       TT      TT
6       108858325       T       TT              +-      +-      TT      TT
6       108858326       T       TT              +       +       TT      TT

So basically I need all the information which have a blank value AND "?1" in that particular column..
# 4  
Old 09-18-2013
Like this:
awk ' $5 !~ /?[2-9]/{print $0}' filename

This User Gave Thanks to greet_sed For This Post:
# 5  
Old 09-18-2013
With grep and extended REs:
grep -Ev '\?(2|3|4|5|6|7|8)'  file
C       Pos           Ref     BestGen BestQual  A+-     B+-     SP      CV
6       108858312       C       CC      ?1      +       +       CC      CC
6       108858313       T       TT              +       +       TT      TT
6       108858325       T       TT              +-      +-      TT      TT
6       108858326       T       TT              +       +       TT      TT

And, small corrections/improvement to greet_sed's proposal:
awk ' $5 !~ /\?[2-8]/' file

# 6  
Old 09-18-2013
Here regular expression for grep command that check 5th field:
grep -Ev '^([^ ]+ +){4}\?[2-8]' file

# 7  
Old 09-19-2013
You do not need the print command, its default.
awk '$5!~/?[2-9]/' filename

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