UNIX for Advanced & Expert Users

Gaurav,

Sorry, but the same errors occur with new file name

Kingkong

Kingkong

did you removed the previous script named max
if not delete it and then run the new script

Gaurav

Gaurav,

I renamed it, so the script max is gone.

Kingkong

Ok this is my last try,

Copy the exact script in solution.sh. Keep your data in file.txt.
And in the script change the variable name max to something else, may be maximum everywhere.
Then run the script with set -x enabled and post the output here.

Do it one more time, we will do it and find the error man.

Gaurav

Gaurav,

Sorry, but it still does not work.

Output:

+ solution.sh
+ maximum=0
+ cat file.txt
+ read LINE
++ echo 1001 34.5 68.7 67
++ awk '{print $2}'
+ fir=34.5
++ echo 1001 34.5 68.7 67
++ awk '{print $3}'
+ sec=68.7
+ '[' 34.5 -gt 0 ']'
./solution.sh: line 7: [: 34.5: integer expression expected
+ '[' 68.7 -gt 0 ']'
./solution.sh: line 10: [: 68.7: integer expression expected
+ read LINE
++ echo 1002 22.0 40.1 32
++ awk '{print $2}'
+ fir=22.0
++ echo 1002 22.0 40.1 32
++ awk '{print $3}'
+ sec=40.1
+ '[' 22.0 -gt 0 ']'
./solution.sh: line 7: [: 22.0: integer expression expected
+ '[' 40.1 -gt 0 ']'
./solution.sh: line 10: [: 40.1: integer expression expected
+ read LINE
++ echo 1003 11.3 34.8 45
++ awk '{print $2}'
+ fir=11.3
++ echo 1003 11.3 34.8 45
++ awk '{print $3}'
+ sec=34.8
+ '[' 11.3 -gt 0 ']'
./solution.sh: line 7: [: 11.3: integer expression expected
+ '[' 34.8 -gt 0 ']'
./solution.sh: line 10: [: 34.8: integer expression expected
+ read LINE
+ grep 0 file.txt
1001 34.5 68.7 67
1002 22.0 40.1 32
1003 11.3 34.8 45

Kingkong

Hi Kingkong,

Sorry Buddy, Now we'll wait for someone to resolve the problem.
Just do one thing paste your entire code here for the reference of Gurus and if possible specify the exact problem.

Regards,
Gaurav

Gaurav,

Problem:
I want to find the maximum value in column 2 and 3 in file.txt (given below) and print the line containing this value. Hence, the following line should be printed (because 68.7 is maximum)

1001 34.5 68.7 67

Script named solution.sh:

set -x
maximum=0
cat file.txt|while read LINE
do
fir=`echo $LINE|awk '{print $2}'`
sec=`echo $LINE|awk '{print $3}'`
if [ $fir -gt $maximum ]; then
typeset maximum=$fir
fi
if [ $sec -gt $maximum ];then
typeset maximum=$sec
fi
done

grep $maximum file.txt


file.txt:

1001 34.5 68.7 67
1002 22.0 40.1 32
1003 11.3 34.8 45

Kingkong