Sponsored Content
Full Discussion: Reading a file into array
Top Forums Shell Programming and Scripting Reading a file into array Post 302834683 by satishmallidi on Friday 19th of July 2013 02:10:26 PM
Old 07-19-2013
Reading a file into array

Hi,

I need to read a file into array and print them in a loop:-
1st file :-cat a.txt
RC1
RC2
RC3
RC4

My Program:-
Code:
#!/bin/ksh
index=0
while [ $index -lt 5 ]
do
       read cnt[index]<a.txt
       print "cnt [$index] value is ${cnt[index]}
       index=`expr $index + 1`
done

Moderator's Comments:
Mod Comment Code tags for code, please.

Result expected :-
Code:
cnt[0] value is RC1
cnt[1] value is RC2
cnt[2] value is RC3
cnt[3] value is RC4

But i am getting the below result :-
Code:
cnt[0] value is RC1
cnt[1] value is RC1
cnt[2] value is RC1
cnt[3] value is RC1

I think there is a problem the way i am reading the file into the array

Last edited by Scott; 07-20-2013 at 01:00 AM.. Reason: Code tags
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Reading a file into an array

I have a file that is a text file, how to get all the words into and array, i am able to get each line but not each word :(. Here is what i searched and already found...https://www.unix.com/shell-programming-scripting/99207-pipe-text-file-into-array.html. This one reads a whole line into... (6 Replies)
Discussion started by: SasankaBITS
6 Replies

2. Shell Programming and Scripting

Bash: Reading out rows of a file into a dynamic array and check first literal

Hello, i have a file "Movie.ini" looking e.g. like follows * MOVIE A bla bla MOVIE B blubb blubb MOVIE C I'd like to read the file "Movie.ini" with cat and grep and check whether it includes the string MOVIE only with a '*' at the beginnig. By doing "cat Movie.ini| grep MOVIE... (14 Replies)
Discussion started by: ABE2202
14 Replies

3. Shell Programming and Scripting

Reading from array

Hi, I have an array like below... Table="table1" Table="table2" Table="table3" Table="table4" ..... Table="tablen" I want to retireve the values from the array and need to pass this to a db2 command to create a view like below. the number of values in the array will vary ... (1 Reply)
Discussion started by: ratheeshjulk
1 Replies

4. Programming

Reading Scientific notation from file and storing in array

Hi, I am trying to read a set of numbers that are in scientific notation into a file so I can do some math on them, but when I display the array contents the numbers aren't the same as the numbers in the file. Could someone explain why? Thanks. int main() { double fArray; ... (3 Replies)
Discussion started by: Filter500
3 Replies

5. Shell Programming and Scripting

Reading from a file and assigning to an array in perl

I wrote a simply perl that searched a file for a particualr value and if it found it, rite it and the next three lines to a file. Now I have been asked to check those next three lines for a different value and only write those lines if it finds the second value. I was thinking the best way to... (1 Reply)
Discussion started by: billprice13
1 Replies

6. Shell Programming and Scripting

reading data from a file to an array

I need some help with this code below, i doesnt know why it will run twice with my function, but my function only got if else, any other way that can read line and put into array? while read line; do read -A array <<<$line n=${#array} for ((i=1;i<$n;i++)); do print... (1 Reply)
Discussion started by: gavin_L
1 Replies

7. Shell Programming and Scripting

Help with reading column in array

I have some version problem to use this code in my server while read line; do read -A array <<<$line <---------- the server dont read <<< n=${#array} for ((i=1;i<$n;i++)); do print "${array}" done func=${array} data1=${array} data2=${array} ... (1 Reply)
Discussion started by: gavin_L
1 Replies

8. Shell Programming and Scripting

Reading columns from a text file and to make an array for each column

Hi, I am not so familiar with bash scripting and would appreciate your help here. I have a text file 'input.txt' like this: 2 3 4 5 6 7 8 9 10 I want to store each column in an array like this a ={2 5 8}, b={3 6 9}, c={4 7 10} so that i can access any element, e.g b=6 for the later use. (1 Reply)
Discussion started by: Asif Siddique
1 Replies

9. Shell Programming and Scripting

Reading a file into an array

Hi I have a file with contents as below : server | ABC Issue : File System Missing XYZ Issue : Wrong Syntax PQR Issue : Old File to be removed Now I am looking for an o/p similar to server <tab> ABC Issue : File System Missing <tab> XYZ Issue : Wrong Syntax <tab>... (4 Replies)
Discussion started by: deo_kaustubh
4 Replies

10. Shell Programming and Scripting

Help reading the array and sum of the array elements

Hi All, need help with reading the array and sum of the array elements. given an array of integers of size N . You need to print the sum of the elements in the array, keeping in mind that some of those integers may be quite large. Input Format The first line of the input consists of an... (1 Reply)
Discussion started by: nishantrefound
1 Replies
ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME
ppmtosixel - convert a portable pixmap into DEC sixel format SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile] DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC LJ250 color inkjet printer. If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file. OPTIONS
-raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com- pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni- tude larger than a compressed file and prints much slower. -margin If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci- fied, a 1.5 inch left margin will offset the image. PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?. BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation. SEE ALSO
ppm(5) AUTHOR
Copyright (C) 1991 by Rick Vinci. 26 April 1991 ppmtosixel(1)
All times are GMT -4. The time now is 03:08 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy