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Remove parenthesis and run awk calculation

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# 1  
Old 06-02-2016
Remove parenthesis and run awk calculation
The awk below works fine if I manually remove the () from file1. However, when I try to use tr to remove the () and then | into awk to run the calculation no result is obtained. Is there a way to tell the awk to ignore the () in fiile1 if they are there or do I need to remove them first? Thank you Smilie.

awk with tr
Code:
cat file1 | tr -d '()' | awk 'FNR==NR{A[$1]=$2;next} ($1 in A){X=(A[$1]/$3)*100;printf("%s %.2f\n",$1,  100-X)}' file1 file2

file1
Code:
(ADH5) 1125

file2
Code:
ADH5 9 1125

desired output
Code:
ADH5 0.00

# 2  
Old 06-02-2016
You certainly know that all your efforts catting and tring are in vain if your awk doesn't read from stdin i.e. the last pipe?

Try
Code:
awk '{gsub(/[()]/,_)} FNR==NR{A[$1]=$2;next} ($1 in A){X=(A[$1]/$3)*100;printf("%s %.2f\n",$1,  100-X)}' file1 file2
ADH5 0.00

This User Gave Thanks to RudiC For This Post:
cmccabe
# 3  
Old 06-02-2016
I am not too familiar with gsub. awk '{gsub(/[()]/,_)}, does this look at all lines of the file and if it finds (), removes them? Thank you Smilie

Just for learning could I specify a field in the gsub? I don't need to in this case but might in the future.

Maybe,
Code:
awk '{gsub $1(/[()]/,_)}

# 4  
Old 06-02-2016
man awk:
Quote:
gsub(r,s,t) gsub(r,s)
Global substitution, every match of regular expression r in variable t is replaced by string s. The number of replacements is returned. If t is omitted,
$0 is used.
t can be any variable including fields.
This User Gave Thanks to RudiC For This Post:
cmccabe
# 5  
Old 06-02-2016
Quote:
Originally Posted by cmccabe
I am not too familiar with gsub. awk '{gsub(/[()]/,_)}, does this look at all lines of the file and if it finds (), removes them? Thank you Smilie
Just for learning could I specify a field in the gsub? I don't need to in this case but might in the future.
Maybe,
Code:
awk '{gsub(/[()]/,_)}

Hello cmccabe,

As RudiC already stated the use of gsub(/[()]/,_) means substituting /[()]/,_ red colored characters with blue character's value(which is NULL).

Thanks,
R. Singh
Last edited by RavinderSingh13; 06-02-2016 at 03:39 PM..
This User Gave Thanks to RavinderSingh13 For This Post:
cmccabe
# 6  
Old 06-13-2016
Thank you both very much Smilie.
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