1. Shell Programming and Scripting

Hi, Could anyone please explain why we have arr=1 - what does this statement do? awk -F\; 'FNR==NR{arr=1;next};$3 in arr' core.txt gmrd.txt Any help appreciated (2 Replies)

2. Shell Programming and Scripting

As I know: FNR: The ordinal number of the current record in the current file. NR: The ordinal number of the current record from the start of input. I don't understand really differency between NR and FNR. Who can explain it for me? And give me an example. Thanks (1 Reply)

3. Shell Programming and Scripting

hi, i have two files, both with 3 columns, the 3rd column has common values between the two files and i want to produce a 3rd file with 4 columns. file 1 a, ,b c file 2 a, b ,d I want to compare the 3rd value and if a match print to file 3 with the 3 columns from the first file... (11 Replies)

4. Shell Programming and Scripting

Hi , I have file : after i run this command : there are error can we print blank line if output error ?? thanks.. ^^ (4 Replies)

5. UNIX for Dummies Questions & Answers

foo.txt FAMID IID AFF SEX Group AgeCat Dis1 Dis2 Dis3 Dis4 Dis5 Dis6 Dis6 AMD0001 Mayo_49542 1 2 AMD 8 1 1 1 1 1 1 1 AMD0002 Mayo_49606 1 1 AMD 3 1 1 1 1 ... (7 Replies)

6. UNIX for Dummies Questions & Answers

Hi Guys, I have two files: f1: A B C D E F G H f2: A X Y Z f1 has 48000 lines, and f2 has 68. I have been matching f1 $3 to f2 $1, and getting f3: A A B C D E F G I would like f3 too look like this: A X Y Z A B C D E F G (2 Replies)

7. Shell Programming and Scripting

awk -F'' 'FNR==NR {a=$2; next} {$1=a} 1' $useralias ${entries} >> ${entries}_2 Hi, Is there anyway to alter this command so that if it does not find a match it will just leave the line alone instead of replacing what it doesn't find with a blank space? (4 Replies)

8. Shell Programming and Scripting

Example: $ cat file1 2 3$ cat file2 1 2 3 4 5 6The following awk script works like a charm, NR==FNR is true for file1, the remainder runs for file2: awk ' NR==FNR {A; next} ($1 in A) ' file1 file2 2 3Now have an empty file1: >file1and run the awk script again. The result is empty... (8 Replies)

9. Shell Programming and Scripting

Hi everybody! need some awk-support. i want a line-selective printout of a file. wat i normally will do with ... awk ' FNR==8' sample.txt But now i need the data from line 8, 10 and the following data from line13 to 250 wich is not end of the file. I tried allready to combine it but without... (2 Replies)

10. Shell Programming and Scripting

Sorry for the probably strangely worded title but I don't really know how else to put it. Background context: Post processing LAMMPS simulation data. tl;dr: I'm making two spheres collide, every defined timestep the simulation outputs a bunch of data including total energy of the particles,... (10 Replies)