Transforming 3 columns to matrix format Post: 302738343

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Top Forums Programming Transforming 3 columns to matrix format Post 302738343 by RudiC on Saturday 1st of December 2012 05:14:44 AM

12-01-2012

Registered User

This proposal does not depend on column 1 being sorted (as others above do), it will collect lines correctly into the matrix elements even if the key comes up again later with more values. It would not, of course, have the across columns sorted, then. Empty/missing elements are leaving a gap in the output:

Code:

$ awk  '{for (i=1; i<=LnCnt; i++) if ($1 == Ln[i]) break; if (i > LnCnt) Ln[++LnCnt]=$1}
        {for (j=1; j<=HdCnt; j++) if ($2 == Hd[j]) break; if (j > HdCnt) Hd[++HdCnt]=$2}
        {Mx[$1,$2] = $3}
        END {printf "%10s", ""; for (j=1; j<=HdCnt; j++)  printf "%10s", Hd[j]; printf "\n";
             for (i=1; i<=LnCnt; i++)  {printf "%10s", Ln[i];
                                        for (j=1; j<=HdCnt; j++) printf "%10s", Mx[Ln[i], Hd[j]];
                                        printf "\n"
                                       }
            }
       ' file
              D2cls0    D2cls1    D2cls2    D2cls8    D2cls9    D2cls3    D2cls4    D2cls5    D2cls6    D2cls7
    D2cls0         1     0.308     0.554     0.625     0.429     0.287     0.633               0.665     0.698
    D2cls2       0.1     1.308     1.554               1.429     1.287     1.633     1.341     1.665     1.698

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dlamrg.f

dlamrg.f(3)							      LAPACK							       dlamrg.f(3)

NAME

       dlamrg.f -

SYNOPSIS

   Functions/Subroutines
       subroutine dlamrg (N1, N2, A, DTRD1, DTRD2, INDEX)
	   DLAMRG creates a permutation list to merge the entries of two independently sorted sets into a single set sorted in ascending order.

Function/Subroutine Documentation
   subroutine dlamrg (integerN1, integerN2, double precision, dimension( * )A, integerDTRD1, integerDTRD2, integer, dimension( * )INDEX)
       DLAMRG creates a permutation list to merge the entries of two independently sorted sets into a single set sorted in ascending order.

       Purpose:

	    DLAMRG will create a permutation list which will merge the elements
	    of A (which is composed of two independently sorted sets) into a
	    single set which is sorted in ascending order.

       Parameters:
	   N1

		     N1 is INTEGER

	   N2

		     N2 is INTEGER
		    These arguements contain the respective lengths of the two
		    sorted lists to be merged.

	   A

		     A is DOUBLE PRECISION array, dimension (N1+N2)
		    The first N1 elements of A contain a list of numbers which
		    are sorted in either ascending or descending order.  Likewise
		    for the final N2 elements.

	   DTRD1

		     DTRD1 is INTEGER

	   DTRD2

		     DTRD2 is INTEGER
		    These are the strides to be taken through the array A.
		    Allowable strides are 1 and -1.  They indicate whether a
		    subset of A is sorted in ascending (DTRDx = 1) or descending
		    (DTRDx = -1) order.

	   INDEX

		     INDEX is INTEGER array, dimension (N1+N2)
		    On exit this array will contain a permutation such that
		    if B( I ) = A( INDEX( I ) ) for I=1,N1+N2, then B will be
		    sorted in ascending order.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 100 of file dlamrg.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2							  Tue Sep 25 2012						       dlamrg.f(3)