Array and Selection

ZINGARO · #1 (**permalink**) 07-12-2007

I have a question:

Y X
Tabel a is a array multidimensional --> a(1024,20)

I load in to array a Text from 6000 row where:
in a(1,1) is present the row 1 of original text, in a(1024,1) is present then row 1024 of original test and in a(1024,2) is present the row 2048 of original text , in a(1,3) is present the row 2049 the ooriginal text ecc....

fig.

1 2 3 4 (X array)

1

.. > ( Y array)

..

...

1024 1024 1024 1024

I find a procedure / function to point a cell(x,y) where in input are the l row of original text loaded.

es function Position (row Y, column x)

-- solve --

POSFOUND=xxxxxx in the original text.

and
function PosArray ( roworiginal x )
Rowxres and Columres return the array position

tanks

ZINGARO · #2 (**permalink**) 07-12-2007

Remember !!!!

I use Posix shell (ksh)

tanks

Perderabo · #3 (**permalink**) 07-12-2007

I'm not sure I follow you. But here is an attempt at what I think you may want:

Code:

#! /usr/bin/ksh

nline=0
while read line ; do
        ((element=nline%1000))
        ((narray=nline/1000))
        eval array${narray}[$element]=\$line
        ((nline=nline+1))
done < bigfile
((count=narray*1000+element))




while echo enter x,y \\c  ; read  x y ; do
        echo x = $x
        echo y = $y

        ((lineno=(y-1)*1024+x))
        echo lineno = $lineno
        ((element=(lineno-1)%1000))
        ((narray=(lineno-1)/1000))
        echo element = $element
        echo narray = $narray
        eval value=\"\${array${narray}[$element]}\"
        echo value = $value
done
echo
exit 0

The first paragraph just reads a file into a very large array. Ideally, I would use a 6000 element array. But ksh does not guarantee that arrays that large will work. So I use a collection of arrays, each with 1000 elements. To access element 1234, I use real element 234 of array 1. Then I have a loop that reads coordinates and calculates the line number coresponding to those coordinates. Then I convert the line number to array/element and grab the value. To test it, I created a bigfile with:
yes | awk '{print NR,$0}' | sed 6000q > bigfile

ZINGARO · #4 (**permalink**) 07-15-2007

how you declare a collection of array ???

why in you procedure not use the sintax Array[x,y] but eval array${narray}[$element]=\$line ???

very taks

Perderabo · #5 (**permalink**) 07-15-2007

You just start using an array, no need to "declare" it. ksh does not have multi-dimensioned arrays. It only has one dimensional arrays. So I had to improvise.

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
awk selection on fields	amatuer_lee_3	Shell Programming and Scripting	3	05-13-2008 01:05 AM
Opt out selection	drhowarddrfine	Post Here to Contact Site Administrators and Moderators	5	01-24-2008 02:20 AM
create array holding characters from sring then echo array.	rorey_breaker	Shell Programming and Scripting	5	09-28-2007 08:42 AM
tray selection	amit kul	UNIX for Advanced & Expert Users	3	07-16-2007 08:31 AM
Character selection script	Ypnos	Shell Programming and Scripting	2	11-20-2003 01:08 PM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode	Rate This Thread:


	Powered by