problem with if else statement in awk











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0
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I have a file like this:



Archaea     2   domain      

Archaea Aenigmarchaeota     11084   phylum      123


I am trying to use the if else statement in awk. I want to get the last column of each line and then check:



if{(its is a number) print (column)} else (print the previous colum)


I have tried this: 



awk '{if(NF=/[0-9]/){print $(NF-1)} else{print $(NF)}}' head.txt


What am I doing wrong?






text-processing awk







share|improve this question




















  • 1




    $NF ~ /[0-9]/
    – steeldriver
    Sep 16 '16 at 12:02










  • awk '{if($NF~/[0-9]/){print $NF} else{print $(NF-1)}}' head.txt .. fixes: NF to $NF , = to ~ and variables to print are exchanged... @ocurran's answer is a good alternative
    – Sundeep
    Sep 16 '16 at 14:57















up vote
0
down vote

favorite












I have a file like this:



Archaea     2   domain      

Archaea Aenigmarchaeota     11084   phylum      123


I am trying to use the if else statement in awk. I want to get the last column of each line and then check:



if{(its is a number) print (column)} else (print the previous colum)


I have tried this: 



awk '{if(NF=/[0-9]/){print $(NF-1)} else{print $(NF)}}' head.txt


What am I doing wrong?






text-processing awk







share|improve this question




















  • 1




    $NF ~ /[0-9]/
    – steeldriver
    Sep 16 '16 at 12:02










  • awk '{if($NF~/[0-9]/){print $NF} else{print $(NF-1)}}' head.txt .. fixes: NF to $NF , = to ~ and variables to print are exchanged... @ocurran's answer is a good alternative
    – Sundeep
    Sep 16 '16 at 14:57













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have a file like this:



Archaea     2   domain      

Archaea Aenigmarchaeota     11084   phylum      123


I am trying to use the if else statement in awk. I want to get the last column of each line and then check:



if{(its is a number) print (column)} else (print the previous colum)


I have tried this: 



awk '{if(NF=/[0-9]/){print $(NF-1)} else{print $(NF)}}' head.txt


What am I doing wrong?






text-processing awk







share|improve this question















I have a file like this:



Archaea     2   domain      

Archaea Aenigmarchaeota     11084   phylum      123


I am trying to use the if else statement in awk. I want to get the last column of each line and then check:



if{(its is a number) print (column)} else (print the previous colum)


I have tried this: 



awk '{if(NF=/[0-9]/){print $(NF-1)} else{print $(NF)}}' head.txt


What am I doing wrong?






text-processing awk




text-processing awk






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 25 at 22:30









Rui F Ribeiro

38.3k1477127




38.3k1477127










asked Sep 16 '16 at 11:59









vic-3

1033




1033








  • 1




    $NF ~ /[0-9]/
    – steeldriver
    Sep 16 '16 at 12:02










  • awk '{if($NF~/[0-9]/){print $NF} else{print $(NF-1)}}' head.txt .. fixes: NF to $NF , = to ~ and variables to print are exchanged... @ocurran's answer is a good alternative
    – Sundeep
    Sep 16 '16 at 14:57














  • 1




    $NF ~ /[0-9]/
    – steeldriver
    Sep 16 '16 at 12:02










  • awk '{if($NF~/[0-9]/){print $NF} else{print $(NF-1)}}' head.txt .. fixes: NF to $NF , = to ~ and variables to print are exchanged... @ocurran's answer is a good alternative
    – Sundeep
    Sep 16 '16 at 14:57








1




1




$NF ~ /[0-9]/
– steeldriver
Sep 16 '16 at 12:02




$NF ~ /[0-9]/
– steeldriver
Sep 16 '16 at 12:02












awk '{if($NF~/[0-9]/){print $NF} else{print $(NF-1)}}' head.txt .. fixes: NF to $NF , = to ~ and variables to print are exchanged... @ocurran's answer is a good alternative
– Sundeep
Sep 16 '16 at 14:57




awk '{if($NF~/[0-9]/){print $NF} else{print $(NF-1)}}' head.txt .. fixes: NF to $NF , = to ~ and variables to print are exchanged... @ocurran's answer is a good alternative
– Sundeep
Sep 16 '16 at 14:57










1 Answer
1






active

oldest

votes

















up vote
4
down vote



accepted










You don't need explicit If/Else logic:



awk '$NF ~ /[0-9]/ {print $NF; next}; {print $(NF-1)}'





share|improve this answer























  • doesn't print what OP wants
    – Rahul
    Sep 16 '16 at 12:16






  • 1




    @Rahul the output appears to be consistent with the OP's textual description - their attempted solution appears to have inverted the logic
    – steeldriver
    Sep 16 '16 at 12:25











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1 Answer
1






active

oldest

votes








1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
4
down vote



accepted










You don't need explicit If/Else logic:



awk '$NF ~ /[0-9]/ {print $NF; next}; {print $(NF-1)}'





share|improve this answer























  • doesn't print what OP wants
    – Rahul
    Sep 16 '16 at 12:16






  • 1




    @Rahul the output appears to be consistent with the OP's textual description - their attempted solution appears to have inverted the logic
    – steeldriver
    Sep 16 '16 at 12:25















up vote
4
down vote



accepted










You don't need explicit If/Else logic:



awk '$NF ~ /[0-9]/ {print $NF; next}; {print $(NF-1)}'





share|improve this answer























  • doesn't print what OP wants
    – Rahul
    Sep 16 '16 at 12:16






  • 1




    @Rahul the output appears to be consistent with the OP's textual description - their attempted solution appears to have inverted the logic
    – steeldriver
    Sep 16 '16 at 12:25













up vote
4
down vote



accepted







up vote
4
down vote



accepted






You don't need explicit If/Else logic:



awk '$NF ~ /[0-9]/ {print $NF; next}; {print $(NF-1)}'





share|improve this answer














You don't need explicit If/Else logic:



awk '$NF ~ /[0-9]/ {print $NF; next}; {print $(NF-1)}'






share|improve this answer














share|improve this answer



share|improve this answer








edited Sep 16 '16 at 12:19









chaos

34.8k773115




34.8k773115










answered Sep 16 '16 at 12:13









ocurran

1942




1942












  • doesn't print what OP wants
    – Rahul
    Sep 16 '16 at 12:16






  • 1




    @Rahul the output appears to be consistent with the OP's textual description - their attempted solution appears to have inverted the logic
    – steeldriver
    Sep 16 '16 at 12:25


















  • doesn't print what OP wants
    – Rahul
    Sep 16 '16 at 12:16






  • 1




    @Rahul the output appears to be consistent with the OP's textual description - their attempted solution appears to have inverted the logic
    – steeldriver
    Sep 16 '16 at 12:25
















doesn't print what OP wants
– Rahul
Sep 16 '16 at 12:16




doesn't print what OP wants
– Rahul
Sep 16 '16 at 12:16




1




1




@Rahul the output appears to be consistent with the OP's textual description - their attempted solution appears to have inverted the logic
– steeldriver
Sep 16 '16 at 12:25




@Rahul the output appears to be consistent with the OP's textual description - their attempted solution appears to have inverted the logic
– steeldriver
Sep 16 '16 at 12:25


















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