Extracting specific lines of data from a file and related lines of data based on a grep value range?


 
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# 1  
Old 05-18-2011
Extracting specific lines of data from a file and related lines of data based on a grep value range?

Hi,
I have one file, say file 1, that has data like below where 19900107 is the date,

19900107 12 144 129 0.7380047
19900108 12 168 129 0.3149017
19900109 12 192 129 3.2766666E-02
19900110 12 216 129 -2.0089082E-02
19900111 12 240 129 -0.3891007
19900107 12 120 151 0.8195071

I want to extract all info from this file , and send it to file 2, that has a line with "240" and a value at the end between 0.8 and 1. Any line that matches this criteria i also want to extract the previous 5 lines of data (i.e. the previous 5 dates). All any any help is appreciated. I'm a new linux user. Smilie
# 2  
Old 05-18-2011
Code:
awk '{v=w;w=x;x=y;y=z;z=$0}$3==240&&($NF>=0.8)&&($NF<=1){print v"\n"w"\n"x"\n"y"\n"z}' infile

use nawk or /usr/xpg4bin/awk instead of awk if running SunOS or Solaris
# 3  
Old 05-18-2011
Code:
awk -v x=120 -v y=0.8 -v z=1 '{a[NR]=$0}$3==x && $NF>=y && $NF<=z{for(i=(NR-5);i++<NR;) print a[i]}' file > newfile

# 4  
Old 05-18-2011
Done

Thanks very the prompt reply

that works perfect
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