awk to remove lines where field count is greather than 1 in two fields


 
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# 1  
Old 01-09-2017
awk to remove lines where field count is greather than 1 in two fields

I am trying to remove all the lines and spaces where the count in $4 or $5 is greater than 1 (more than 1 letter). The file and the output are tab-delimited. Thank you Smilie.

file
Code:
X    5811530    .    G    C    NLGN4X
17    10544696    .    GA    G    MYH3
9    96439004    .    C    CCCTGCCTCCACCACA    PHF2
11    47463483    .    AG    A    RAPSN
15    58988898    .    A    C    AAAA
6    32006214    .    CCTG    C    CYP21A2

desired output
Code:
X    5811530    .    G    C    NLGN4X
15    58988898    .    A    C    AAAA

awk
Code:
awk -F'\t' -v OFS='\t' '(NR>1) && ($4 > 1 ) && ($5 > 1) ' file


Last edited by cmccabe; 01-09-2017 at 04:11 PM.. Reason: added details
# 2  
Old 01-09-2017
Try:
Code:
awk -F'\t' 'length($4) == 1 && length($5) == 1' file

Note that:
  • the condition $4 > 1 looks for a numeric value at the start of the 4th field evaluating to a number greater than 1 no matter how many characters are in the 4th input field,
  • there is no need to set OFS if you only print copies of some of your input lines without changing the contents of any of the lines you print, and
  • there is no need to use the condition NR>1 when there is no header line to discard.
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