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Full Discussion: Compare values in multiple rows in one column using awk
Top Forums UNIX for Beginners Questions & Answers Compare values in multiple rows in one column using awk Post 303043943 by jiam912 on Tuesday 11th of February 2020 02:50:26 PM
Old 02-11-2020
Compare values in multiple rows in one column using awk
I would like to compare values in column 8, and grep the ones where the different is > 1, columns 1 and 2 are the key for array.

Every 4 rows the records values in columns 1 and 2 changed. Then, the comparison in the column 8 need to be done for the 4 rows everytime columns 1 and 2 changed

input file

Code:
    47329,39785,2,12,10,351912.50,2533105.56,170.93,1
    47329,39785,2,12,28,351912.53,2533118.81,172.91,1
    47329,39785,3,6,7,351912.82,2533105.07,170.89,1
    47329,39785,3,6,20,351913.03,2533117.41,170.93,1
    47329,39797,2,12,10,352063.14,2533117.84,170.66,1
    47329,39797,2,12,28,352062.77,2533104.67,173.63,1
    47329,39797,3,6,7,352064.11,2533119.32,170.64,1
    47329,39797,3,6,20,352063.50,2533107.10,170.69,1
    47329,39809,2,12,10,352212.35,2533106.19,170.79,1
    47329,39809,2,12,28,352212.45,2533119.12,170.68,1
    47329,39809,3,6,7,352212.01,2533105.75,170.77,1
    47329,39809,3,6,20,352211.89,2533117.91,170.78,1
    47329,39821,3,6,7,352363.73,2533120.01,171.14,1
    47329,39821,3,6,20,352363.25,2533107.48,171.22,1
    47329,39821,2,12,10,352362.49,2533118.77,175.27,1
    47329,39821,2,12,28,352362.15,2533106.48,171.25,1

Desired output

Code:
 47329,39785,2,12,28,351912.53,2533118.81,172.91,1,
    47329,39797,2,12,28,352062.77,2533104.67,173.63,1
    47329,39821,2,12,10,352362.49,2533118.77,175.27,1

I have tried to substrat rows in column 8, but i am unable to get the desired output

Code:
 awk -F, '{$10 = $8 - prev8; prev8 = $8; print $0}' file

Thanks in advance for your help
 

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LEARN ABOUT MINIX

ascii

ASCII(7)						 Miscellaneous Information Manual						  ASCII(7)

NAME

       ascii - the ASCII character set.

DESCRIPTION

       The ASCII character set is as follows:

       |000 nul|001 soh|002 stx|003 etx|004 eot|005 enq|006 ack|007 bel|
       |010 bs |011 ht |012 nl |013 vt |014 np |015 cr |016 so |017 si |
       |020 dle|021 dc1|022 dc2|023 dc3|024 dc4|025 nak|026 syn|027 etb|
       |030 can|031 em |032 sub|033 esc|034 fs |035 gs |036 rs |037 us |
       |040 sp |041  ! |042  " |043  # |044  $ |045  % |046  & |047  ' |
       |050  ( |051  ) |052  * |053  + |054  , |055  - |056  . |057  / |
       |060  0 |061  1 |062  2 |063  3 |064  4 |065  5 |066  6 |067  7 |
       |070  8 |071  9 |072  : |073  ; |074  < |075  = |076  > |077  ? |
       |100  @ |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 |133  [ |134   |135  ] |136  ^ |137  _ |
       |140  ` |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 |173  { |174  | |175  } |176  ~ |177 del|

       |00 nul|01 soh|02 stx|03 etx|04 eot|05 enq|06 ack|07 bel|
       |08 bs |09 ht |0A nl |0B vt |0C np |0D cr |0E so |0F si |
       |10 dle|11 dc1|12 dc2|13 dc3|14 dc4|15 nak|16 syn|17 etb|
       |18 can|19 em |1A sub|1B esc|1C fs |1D gs |1E rs |1F us |
       |20 sp |21  ! |22  " |23  # |24	$ |25  % |26  & |27  ' |
       |28  ( |29  ) |2A  * |2B  + |2C	, |2D  - |2E  . |2F  / |
       |30  0 |31  1 |32  2 |33  3 |34	4 |35  5 |36  6 |37  7 |
       |38  8 |39  9 |3A  : |3B  ; |3C	< |3D  = |3E  > |3F  ? |
       |40  @ |41  A |42  B |43  C |44	D |45  E |46  F |47  G |
       |48  H |49  I |4A  J |4B  K |4C	L |4D  M |4E  N |4F  O |
       |50  P |51  Q |52  R |53  S |54	T |55  U |56  V |57  W |
       |58  X |59  Y |5A  Z |5B  [ |5C	 |5D  ] |5E  ^ |5F  _ |
       |60  ` |61  a |62  b |63  c |64	d |65  e |66  f |67  g |
       |68  h |69  i |6A  j |6B  k |6C	l |6D  m |6E  n |6F  o |
       |70  p |71  q |72  r |73  s |74	t |75  u |76  v |77  w |
       |78  x |79  y |7A  z |7B  { |7C	| |7D  } |7E  ~ |7F del|

																	  ASCII(7)
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