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# 1  
Old 10-07-2009
Fill in columns


I've got a file with several columns where some entries are missing.

a b c d
f    g h
j  k    l
p y    r

I need to replace the empty spaces with zero, so the new file would be:

a b c d
f 0 g h
j k 0  l
p y 0 r

The original file is tab delimited.
Many thansk for your help in advance!
# 2  
Old 10-07-2009
For the given input, this will work.
sed 's/\t\t/\t0\t/' a

# 3  
Old 10-07-2009
# cat file
a       b       c       d
f               g       h
j       k               l
p       y               r
# awk '{FS=OFS="\t"}{for(i=1;i++<NF;) $i=($i)?$i:"0"}1' file
a       b       c       d
f       0       g       h
j       k       0       l
p       y       0       r

# 4  
Old 10-08-2009
Many thanks guys!
It all works!!!

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