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Full Discussion: Using Awk to efficiently substitute values using 3 vectors
Top Forums Shell Programming and Scripting Using Awk to efficiently substitute values using 3 vectors Post 302394501 by LaTortuga on Thursday 11th of February 2010 03:13:58 PM
Old 02-11-2010
Data Using Awk to efficiently substitute values using 3 vectors
I'm trying to efficiently combine the fields of two vectors (vectors b and c) into a new vector (vector d) as defined by instructions from a 3rd vector (vector a). So vector a has either a 1 or 2 in each field specifying which vector (b or c respectively) should go into that field. Vector a is space separated, while vectors b, c, and d are semicolon separated. I made a bash/awk script which does this, but it takes a while:
Code:
z=0
for y in `echo $a_vect`
do
  z=$(( $z + 1 ))            
  if [ "$y" -eq 1 ]; then 
    temp_var=`echo ${b_vect} | awk -F';' '{print $"'"${z}"'"}'`
    d_vect=`echo -ne "${d_vect};${temp_var}"`
  else
    temp_var=`echo ${c_vect} | awk -F';' '{print $"'"${z}"'"}'`
    d_vect=`echo -ne "${d_vect};${temp_var}"`
  fi
done

Last edited by Scott; 02-11-2010 at 04:29 PM.. Reason: Please use code tags
 

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LEARN ABOUT OPENSOLARIS

mlib_vectorconjrev_s32c_s32c_sat

mlib_VectorConjRev_S8C_S8C_Sat(3MLIB)			    mediaLib Library Functions			     mlib_VectorConjRev_S8C_S8C_Sat(3MLIB)

NAME

       mlib_VectorConjRev_S8C_S8C_Sat, mlib_VectorConjRev_S16C_S16C_Sat, mlib_VectorConjRev_S32C_S32C_Sat - vector conjugation reversion

SYNOPSIS

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

       mlib_status mlib_VectorConjRev_S8C_S8C_Sat(mlib_s8 *z,
	    const mlib_s8 *x, mlib_s32 n);

       mlib_status mlib_VectorConjRev_S16C_S16C_Sat(mlib_s16 *z,
	    const mlib_s16 *x, mlib_s32 n);

       mlib_status mlib_VectorConjRev_S32C_S32C_Sat(mlib_s32 *z,
	    const mlib_s32 *x, mlib_s32 n);

DESCRIPTION

       Each of these functions computes the complex reversion of a complex vector.

       The source and destination vectors must be in the same data type.

       The following equation is used:

	 z[2*i]     =  x[2*(n - 1 - i)]
	 z[2*i + 1] = -x[2*(n - 1 - i) + 1]

       where i = 0, 1, ..., (n - 1).

PARAMETERS

       Each of the functions takes the following arguments:

       z    Pointer to the first element of the destination vector.

       x    Pointer to the first element of the source vector.

       n    Number of elements in the vectors.

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

       attributes(5)

SunOS 5.11							    2 Mar 2007				     mlib_VectorConjRev_S8C_S8C_Sat(3MLIB)
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