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Full Discussion: Sum value from selected lines script (awk,perl)
Top Forums Shell Programming and Scripting Sum value from selected lines script (awk,perl) Post 302360883 by Scrutinizer on Sunday 11th of October 2009 06:21:06 AM
Old 10-11-2009
Using awk:

Case1:
Code:
awk '{ sum1[int($1/500)]+=$2 } END { for (i in sum1) print "Sum1 "sum1[i] } ' infile

Case2:
Code:
awk 'BEGIN{
       min=1
     }
     { time[NR]=$1
       val[NR]=sum2[NR]=$2
       i=min
       while (time[NR]-time[i]>=500)
         i++
       min=i
       for (i=min;i<NR;i++)
         sum2[NR]+=val[i]
     }
     END {
       for (i in sum2)
         print "Sum2: "sum2[i]
     }' infile

Case1+2 combined:
Code:
awk 'BEGIN{
       min=1
     }
     { sum1[int($1/500)]+=$2
       time[NR]=$1
       val[NR]=sum2[NR]=$2
       i=min
       while (time[NR]-time[i]>=500)
         i++
       min=i
       for (i=min;i<NR;i++)
         sum2[NR]+=val[i]
     }
     END {
       for (i in sum1)
         print "Sum1 "sum1[i]
       print ""
       for (i in sum2)
         print "Sum2: "sum2[i]
     }' infile

Original testset:
Code:
Sum1 17
Sum1 205
Sum1 96

Sum2: 4
Sum2: 17
Sum2: 218
Sum2: 279
Sum2: 301

Additional testset:
Code:
Sum1 10
Sum1 18

Sum2: 1
Sum2: 3
Sum2: 6
Sum2: 10
Sum2: 15
Sum2: 20
Sum2: 25

 

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LEARN ABOUT OPENSOLARIS

mlib_vectorminimummag_u8c

mlib_VectorMinimumMag_U8C(3MLIB)			    mediaLib Library Functions				  mlib_VectorMinimumMag_U8C(3MLIB)

NAME

       mlib_VectorMinimumMag_U8C,  mlib_VectorMinimumMag_S8C,  mlib_VectorMinimumMag_S16C, mlib_VectorMinimumMag_S32C, mlib_VectorMinimumMag_F32C,
       mlib_VectorMinimumMag_D64C - find the first element with the minimum magnitude in a vector

SYNOPSIS

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

       mlib_status mlib_VectorMinimumMag_U8C(mlib_u8 *min, const mlib_u8 *x,
	    mlib_s32 n);

       mlib_status mlib_VectorMinimumMag_S8C(mlib_s8 *min, const mlib_s8 *x,
	    mlib_s32 n);

       mlib_status mlib_VectorMinimumMag_S16C(mlib_s16 *min, const mlib_s16 *x,
	    mlib_s32 n);

       mlib_status mlib_VectorMinimumMag_S32C(mlib_s32 *min, const mlib_s32 *x,
	    mlib_s32 n);

       mlib_status mlib_VectorMinimumMag_F32C(mlib_f32 *min, const mlib_f32 *x,
	    mlib_s32 n);

       mlib_status mlib_VectorMinimumMag_D64C(mlib_d64 *min, const mlib_d64 *x,
	    mlib_s32 n);

DESCRIPTION

       Each of these functions finds the first element with the minimum magnitude in a complex vector, then puts the real and imaginary  parts	of
       it into min[0] and min[1], respectively.

PARAMETERS

       Each of the functions takes the following arguments:

       min    Pointer to the first element with the minimum magnitude.

       x      Pointer to the first element of the source vector.

       n      Number of elements in the source vector.

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_VectorMaximumMag_U8C(3MLIB), mlib_MatrixMaximumMag_U8C(3MLIB), mlib_MatrixMinimumMag_U8C(3MLIB), attributes(5)

SunOS 5.11							    2 Mar 2007					  mlib_VectorMinimumMag_U8C(3MLIB)
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