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Full Discussion: Passing multiple value in a single argument in Perl.
Top Forums Shell Programming and Scripting Passing multiple value in a single argument in Perl. Post 302930066 by Abhisrajput on Tuesday 30th of December 2014 05:44:49 AM
Old 12-30-2014
Passing multiple value in a single argument in Perl.
Hi all,

I have below code through which trying to pick data from specific columns strating from a certain row.

Code:
#!/usr/bin/perl
#This script is to pick the specific fields from a files starting from a specific row
# FILE -> Name of the file to be pasd at runtime.
# rn -> Number of the row from where the data has to be picked.
use strict;
use warnings;
my $file = shift || "FILE";
my $rn = shift;
my $cols = shift;
open( my $fh, "<", $file) or die "Could not open file '$file' : $!\n";
while (<$fh>) {
    $. <= $rn and next;
    my @fields = split(/\t/);
    print "$fields[$cols]\n";
}

My proble here is I am only able to get one column at a time. I want to fetch columns from
Code:
0, 1, 3..6, 21..33

but its giving me only first column.

I am runing below comand to execute the script.
Code:
perl extract.pl FILE 3 0, 1, 3..6, 21..33

Last edited by Abhisrajput; 12-30-2014 at 12:36 PM.. Reason: Missed the file name
 

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LEARN ABOUT OPENSOLARIS

mlib_matrixmulshift_s16c_s16c_sat

mlib_MatrixMulShift_S16_S16_Mod(3MLIB)			    mediaLib Library Functions			    mlib_MatrixMulShift_S16_S16_Mod(3MLIB)

NAME

       mlib_MatrixMulShift_S16_S16_Mod,  mlib_MatrixMulShift_S16_S16_Sat,  mlib_MatrixMulShift_S16C_S16C_Mod,  mlib_MatrixMulShift_S16C_S16C_Sat -
       matrix multiplication plus shifting

SYNOPSIS

       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       mlib_status mlib_MatrixMulShift_S16_S16_Mod(mlib_s16 *z,
	   const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m,
	   mlib_s32 l, mlib_s32 n, mlib_s32 shift);

       mlib_status mlib_MatrixMulShift_S16_S16_Sat(mlib_s16 *z,
	    const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m,
	    mlib_s32 l, mlib_s32 n, mlib_s32 shift);

       mlib_status mlib_MatrixMulShift_S16C_S16C_Mod(mlib_s16 *z,
	    const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m,
	    mlib_s32 l, mlib_s32 n, mlib_s32 shift);

       mlib_status mlib_MatrixMulShift_S16C_S16C_Sat(mlib_s16 *z,
	    const mlib_s16 *x, const mlib_s16 *y, mlib_s32 m,
	    mlib_s32 l, mlib_s32 n, mlib_s32 shift);

DESCRIPTION

       Each of these functions performs a multiplication of two matrices and shifts the result.

       For real data, the following equation is used:

		       l-1
	 z[i*n + j] = {SUM (x[i*l + k] * y[k*n + j])} * 2**(-shift)
		       k=0

       where i = 0, 1, ..., (m - 1); j = 0, 1, ..., (n - 1).

       For complex data, the following equation is used:

			       l-1
	 z[2*(i*n + j)]     = {SUM (xR*yR - xI*yI)} * 2**(-shift)
			       k=0

			       l-1
	 z[2*(i*n + j) + 1] = {SUM (xR*yI + xI*yR)} * 2**(-shift)
			       k=0

       where

	 xR = x[2*(i*l + k)]
	 xI = x[2*(i*l + k) + 1]
	 yR = y[2*(k*n + j)]
	 yI = y[2*(k*n + j) + 1]
	 i = 0, 1, ..., (m - 1)
	 j = 0, 1, ..., (n - 1)

PARAMETERS

       Each of the functions takes the following arguments:

       z	Pointer to the first element of the result matrix, in row major order.

       x	Pointer to the first element of the first matrix, in row major order.

       y	Pointer to the first element of the second matrix, in row major order.

       m	Number of rows in the first matrix. m > 0.

       l	Number of columns in the first matrix, and the number of rows in the second matrix. l > 0.

       n	Number of columns in the second matrix. n > 0.

       shift	Right shifting factor. 1 <= shift <= 16.

RETURN VALUES

       Each of the functions returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_MatrixMul_U8_U8_Mod(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007				    mlib_MatrixMulShift_S16_S16_Mod(3MLIB)
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