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Full Discussion: Add values to file in 2 new columns
Top Forums UNIX for Beginners Questions & Answers Add values to file in 2 new columns Post 303044018 by jiam912 on Wednesday 12th of February 2020 02:15:45 PM
Old 02-12-2020
Add values to file in 2 new columns
Columns 4 and 5 are X and Y coordinates, column 6 is the elevation

I would like to add 2 new columns at the end of the file with values

the distance between first(X)(Y) and last location (X)(Y), based in 2 rows
the difference in elevation = ($6-prev6)

How to calculate the requested values and add to last columns, and when the records appears only 1 time(columns 1 and 2 single row ), write values 0.00 0.00

Input file

Code:
48047 41513  2  373512.79     2542085.84     154.53      12.64      90.63
48047 41513  3  373513.29     2542085.00     154.52      12.34      91.02
48047 41525  2  373663.51     2542087.65     153.93      12.36      90.70
48047 41525  3  373662.27     2542088.44     153.99      12.76      86.99
48049 39785  2  351912.93     2542112.25     160.91      12.16      90.61
48049 39797  2  352063.17     2542112.38     160.19      12.10      90.66
48049 39809  2  352213.12     2542113.01     159.96      12.24      90.75

Desired Output

Code:
48047 41513  2  373512.79     2542085.84     154.53      12.64      90.63
48047 41513  3  373513.29     2542085.00     154.52      12.34      91.02    0.98     0.01 
48047 41525  2  373663.51     2542087.65     153.93      12.36      90.70
48047 41525  3  373662.27     2542088.44     153.99      12.76      86.99    1.47     0.06
48049 39785  2  351912.93     2542112.25     160.91      12.16      90.61    0.00     0.00
48049 39797  2  352063.17     2542112.38     160.19      12.10      90.66    0.00     0.00
48049 39809  2  352213.12     2542113.01     159.96      12.24      90.75    0.00     0.00

My code works only when the records in columns 1 and 2 are duplicate. If they are not duplicate my code delete the single lines.

Code I use to get the values

Code:
 awk '{
       pp[NR]  = $2
       ll[NR]  = $1
        x[NR]  = $4
        y[NR]  = $5
          z[NR]  = $6
      } END {
               first = 1
               count = 0
               for ( i=1 ; i <= NR ; i++ ) {
                   if (pv[i] != pv[i+1] || line[i] != line[i+1]) {
                      last = i
                      count++
                      dx = x[first]-x[last]
                      dy = y[first]-y[last]
                      el = z[first]-z[last]
                      ele = sqrt(el^2)
                      len[count] = sqrt(dx^2+dy^2)
                      if ( len[count] <= 1000 && len[count] > 0 ) {
                      printf ("%8.2f %8.2f \n",
                      len[count],ele)
                      }\
                      first = i+1
                  }
               }
              }' file

Thanks in advance.
 

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LEARN ABOUT OSX

isalpha

ISALPHA(3)						   BSD Library Functions Manual 						ISALPHA(3)

NAME

     isalpha -- alphabetic character test

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <ctype.h>

     int
     isalpha(int c);

DESCRIPTION

     The isalpha() function tests for any character for which isupper(3) or islower(3) is true.  The value of the argument must be representable
     as an unsigned char or the value of EOF.

     In the ASCII character set, this includes the following characters (preceded by their numeric values, in octal):

     101 ``A''	   102 ``B''	 103 ``C''     104 ``D''     105 ``E''
     106 ``F''	   107 ``G''	 110 ``H''     111 ``I''     112 ``J''
     113 ``K''	   114 ``L''	 115 ``M''     116 ``N''     117 ``O''
     120 ``P''	   121 ``Q''	 122 ``R''     123 ``S''     124 ``T''
     125 ``U''	   126 ``V''	 127 ``W''     130 ``X''     131 ``Y''
     132 ``Z''	   141 ``a''	 142 ``b''     143 ``c''     144 ``d''
     145 ``e''	   146 ``f''	 147 ``g''     150 ``h''     151 ``i''
     152 ``j''	   153 ``k''	 154 ``l''     155 ``m''     156 ``n''
     157 ``o''	   160 ``p''	 161 ``q''     162 ``r''     163 ``s''
     164 ``t''	   165 ``u''	 166 ``v''     167 ``w''     170 ``x''
     171 ``y''	   172 ``z''

RETURN VALUES

     The isalpha() function returns zero if the character tests false and returns non-zero if the character tests true.

COMPATIBILITY

     The 4.4BSD extension of accepting arguments outside of the range of the unsigned char type in locales with large character sets is considered
     obsolete and may not be supported in future releases.  The iswalpha() function should be used instead.

SEE ALSO

     ctype(3), isalnum_l(3), islower(3), isupper(3), iswalpha(3), ascii(7)

STANDARDS

     The isalpha() function conforms to ISO/IEC 9899:1990 (``ISO C90'').

BSD
								   July 17, 2005							       BSD
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