Sponsored Content
Top Forums Shell Programming and Scripting Inserting data - from one file to another? Post 302834931 by Yoda on Saturday 20th of July 2013 04:43:17 PM
Old 07-20-2013
Just curious, why don't you simply create a new file rather than replacing?
Code:
awk '
        {
                C[NR] = $1
                M[NR] = $2
        }
        END {
                print "<tr>"
                print OFS "<td> CPU(%) </td>"
                for ( i = 1; i <= NR; i++ )
                        print OFS "<td> " C[i] " </td>"
                print "</tr>"

                print "<tr>"
                print OFS "<td> MEM(%) </td>"
                for ( i = 1; i <= NR; i++ )
                        print OFS "<td> " M[i] " </td>"
                print "</tr>"
        }
' OFS='\t' file2


Last edited by Yoda; 07-20-2013 at 05:54 PM..
This User Gave Thanks to Yoda For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Inserting a character in a data file

Can some one tell me how I can insert a "|" (pipe) at the 15th column throughout a file? examples: to insert at begining of line i use :g/^/s//\|/ to insert at ene of line i use :g/$/s//\|/ how can i insert at the 15th column position. Thanks in advance (2 Replies)
Discussion started by: jxh461
2 Replies

2. UNIX for Dummies Questions & Answers

inserting into a data file

Hello I have a unix variable $HDR in a script, which contains header info, and I need to create it as a new line at the top of a data file which is the input $1 in the script. Paul (4 Replies)
Discussion started by: paul1s
4 Replies

3. Shell Programming and Scripting

Inserting Lines between data sets using SED?

Hello all and thanks in advance! What I'm looking to do is insert a blank line, anytime the first 9 characters of a given line don't match the first 9 characters of the previous line. i.e. Convert the data set 1 45 64 89 1 89 69 235 2 89 234 67 2 56 90... (1 Reply)
Discussion started by: selkirk
1 Replies

4. Shell Programming and Scripting

Help Inserting data in mysql table

Cant understand the error #!/bin/bash temp="" A="" D=$(date +"%Y-%m-%d") H=$(date +"%R") temp=$(wget -q -O - website | grep -o "Temperature:]**" | grep \-E -o "+") mysql -D "weather_wise" -e "INSERT INTO weather (Date, Hour, Degrees) VALUES ($D,$H, $temp)"; my data types for... (11 Replies)
Discussion started by: vadharah
11 Replies

5. Shell Programming and Scripting

inserting data into a table from a flat file

Hi, I want to insert data into a table from a flat file, the file is having around 25 columns and some 10,000 records. The columns values are seperated by a space. Thanks (1 Reply)
Discussion started by: ss_ss
1 Replies

6. Programming

C++ inserting data in a file

Could anyone help me with an efficient(and easy) way to insert data in a file directly(with out using temp file). example open the file1.txt 11112222 333333 44444444 and insert something say " 99999 " somewhere inside the file as 11112222 333 99999 333 44444444 (2 Replies)
Discussion started by: johnbach
2 Replies

7. Shell Programming and Scripting

Problem with inserting data

Hi, i am doing a simple script to insert logs into particular table through shell script when i run the script, it is inserting null value. Any explanation on this. Here is my script. #!/bin/sh export db_connection_url=apps/apps@VIS ... (2 Replies)
Discussion started by: Rami Reddy
2 Replies

8. Shell Programming and Scripting

Need help on inserting data from text file to excel using shell script

Hi, Please help me on this. I want to insert data from text file to excel using shell script nawk -v r=4 -v c=4 -v val=$a -F, 'BEGIN{OFS=","}; NR != r; NR == r {$c = val; print}' "file.csv" I used above one to insert $a value in 4th row, 4th column in an excel file.csv and it... (3 Replies)
Discussion started by: suman.frnz
3 Replies

9. UNIX for Dummies Questions & Answers

Inserting shell script input data automatically from a text file

Dear experts, I am new to linux programming. I have a shell script which i should run it on all my samples. I only define input and out put for this script. The inputs are 3 numbers(coordination numbers) which are available in a series of text file. Since i have a lots of samples, it takes a... (5 Replies)
Discussion started by: mohamadreza
5 Replies

10. UNIX for Dummies Questions & Answers

Inserting data from another source

Hi, I am creating a script using Vi to go out on emails. Each email has is own set of attachments, each with a unique number eg Q12343 and Q67897. I have managed to get the script to put in the first attachment customer number ie Q12343, but can't figure out how to get the second one to come in ie... (4 Replies)
Discussion started by: Cheryl1234
4 Replies
A2P(1)							 Perl Programmers Reference Guide						    A2P(1)

NAME
a2p - Awk to Perl translator SYNOPSIS
a2p [options] [filename] DESCRIPTION
A2p takes an awk script specified on the command line (or from standard input) and produces a comparable perl script on the standard output. OPTIONS Options include: -D<number> sets debugging flags. -F<character> tells a2p that this awk script is always invoked with this -F switch. -n<fieldlist> specifies the names of the input fields if input does not have to be split into an array. If you were translating an awk script that processes the password file, you might say: a2p -7 -nlogin.password.uid.gid.gcos.shell.home Any delimiter can be used to separate the field names. -<number> causes a2p to assume that input will always have that many fields. -o tells a2p to use old awk behavior. The only current differences are: o Old awk always has a line loop, even if there are no line actions, whereas new awk does not. o In old awk, sprintf is extremely greedy about its arguments. For example, given the statement print sprintf(some_args), extra_args; old awk considers extra_args to be arguments to "sprintf"; new awk considers them arguments to "print". "Considerations" A2p cannot do as good a job translating as a human would, but it usually does pretty well. There are some areas where you may want to examine the perl script produced and tweak it some. Here are some of them, in no particular order. There is an awk idiom of putting int() around a string expression to force numeric interpretation, even though the argument is always integer anyway. This is generally unneeded in perl, but a2p can't tell if the argument is always going to be integer, so it leaves it in. You may wish to remove it. Perl differentiates numeric comparison from string comparison. Awk has one operator for both that decides at run time which comparison to do. A2p does not try to do a complete job of awk emulation at this point. Instead it guesses which one you want. It's almost always right, but it can be spoofed. All such guesses are marked with the comment ""#???"". You should go through and check them. You might want to run at least once with the -w switch to perl, which will warn you if you use == where you should have used eq. Perl does not attempt to emulate the behavior of awk in which nonexistent array elements spring into existence simply by being referenced. If somehow you are relying on this mechanism to create null entries for a subsequent for...in, they won't be there in perl. If a2p makes a split line that assigns to a list of variables that looks like (Fld1, Fld2, Fld3...) you may want to rerun a2p using the -n option mentioned above. This will let you name the fields throughout the script. If it splits to an array instead, the script is probably referring to the number of fields somewhere. The exit statement in awk doesn't necessarily exit; it goes to the END block if there is one. Awk scripts that do contortions within the END block to bypass the block under such circumstances can be simplified by removing the conditional in the END block and just exiting directly from the perl script. Perl has two kinds of array, numerically-indexed and associative. Perl associative arrays are called "hashes". Awk arrays are usually translated to hashes, but if you happen to know that the index is always going to be numeric you could change the {...} to [...]. Iteration over a hash is done using the keys() function, but iteration over an array is NOT. You might need to modify any loop that iterates over such an array. Awk starts by assuming OFMT has the value %.6g. Perl starts by assuming its equivalent, $#, to have the value %.20g. You'll want to set $# explicitly if you use the default value of OFMT. Near the top of the line loop will be the split operation that is implicit in the awk script. There are times when you can move this down past some conditionals that test the entire record so that the split is not done as often. For aesthetic reasons you may wish to change index variables from being 1-based (awk style) to 0-based (Perl style). Be sure to change all operations the variable is involved in to match. Cute comments that say "# Here is a workaround because awk is dumb" are passed through unmodified. Awk scripts are often embedded in a shell script that pipes stuff into and out of awk. Often the shell script wrapper can be incorporated into the perl script, since perl can start up pipes into and out of itself, and can do other things that awk can't do by itself. Scripts that refer to the special variables RSTART and RLENGTH can often be simplified by referring to the variables $`, $& and $', as long as they are within the scope of the pattern match that sets them. The produced perl script may have subroutines defined to deal with awk's semantics regarding getline and print. Since a2p usually picks correctness over efficiency. it is almost always possible to rewrite such code to be more efficient by discarding the semantic sugar. For efficiency, you may wish to remove the keyword from any return statement that is the last statement executed in a subroutine. A2p catches the most common case, but doesn't analyze embedded blocks for subtler cases. ARGV[0] translates to $ARGV0, but ARGV[n] translates to $ARGV[$n-1]. A loop that tries to iterate over ARGV[0] won't find it. ENVIRONMENT
A2p uses no environment variables. AUTHOR
Larry Wall <larry@wall.org> FILES
SEE ALSO
perl The perl compiler/interpreter s2p sed to perl translator DIAGNOSTICS
BUGS
It would be possible to emulate awk's behavior in selecting string versus numeric operations at run time by inspection of the operands, but it would be gross and inefficient. Besides, a2p almost always guesses right. Storage for the awk syntax tree is currently static, and can run out. perl v5.16.2 2012-08-26 A2P(1)
All times are GMT -4. The time now is 03:29 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy