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Getting input data from 2 tables

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# 1  
Old 04-23-2012
Getting input data from 2 tables
Hello All,

I have one table contains:

Table1:

5
10
30
40
60
80
...

Table 2:

10
20
60
80
120
160
..

Now I have divind table2.col 1/table1.col 1 and put the output in third table.

Can you help me to write this in awk as well as in perl....?

Thanks
Krsnadasa
# 2  
Old 04-23-2012
Hi

Hoping you do not mean to say a database table when you say "table":

Code:
$ awk 'NR==FNR{a[i++]=$0;next}{print $0/a[j++]}' file1 file2


Guru.
# 3  
Old 04-23-2012
getting input data from 2 tables
Hu Guru,

Thanks

Can you please explain me the code how it works? You are right these are not db tables.

Thanks
Krsnadasa.
# 4  
Old 04-23-2012
First, we read the contents of File1(NR==FNR) and store in an array(a[i++]=$0). Then, for every entry in the second file, we divide the number by the corresponding array value and print it(print $0/a[j++]).

Guru.
# 5  
Old 04-23-2012
Alternatively:
Code:
awk 'getline p<f {print $1/p}' f=file1 file2

This User Gave Thanks to Scrutinizer For This Post:
guruprasadpr
# 6  
Old 04-24-2012
getting input data from 2 tables
Hi Scruit,

Thanks,

I am getting correct out put but code is little difficult for me to understand. Can you please explain once?

Thanks
Krsnadasa.
# 7  
Old 04-24-2012
Sure:
Code:
awk '                  # For every line in file2
  getline p<f {        # if reading the next line from the file in variable f (containing the name of file1) into variable p is successful
    print $1/p         # then print field 1 of file2 divided by p
  }
' f=file1 file2        # set variable f to file1 and specify file2 as the input file

This User Gave Thanks to Scrutinizer For This Post:
krsnadasa
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