Keep only the closet match of timestamped row (include headers) from file1 to precede file2 row/s Post: 302979477

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Top Forums UNIX for Beginners Questions & Answers Keep only the closet match of timestamped row (include headers) from file1 to precede file2 row/s Post 302979477 by aachave1 on Monday 15th of August 2016 09:16:30 AM

08-15-2016

Registered User

Quote:

Originally Posted by Don Cragun

Hi aachave1,
In post #15 in this thread, you said that you couldn't access your work PC. Is you work PC running a Windows operating system? What operating system and shell are you using?

Please show us the output from the command:

Code:

tail -n 3 filename | od -bc

for both of the files you are using when a line is dropped from your output (replacing filename with the name of one of your files on both invocations).

What is the format of the dates used in your timestamps? Is the timestamp in your input files:

Code:

2014/04/07 16:02:55

for the date April 7, 2014 or for the date July 4, 2014?

Are we correct in assuming that your input files (other than the header line) are sorted in increasing order by timestamp?

Hi Don, sometimes IT at my work are doing maintenance on the weekends which causes me to lose remote access to my PC. My PC is running on windows 8, but I remote in to a Linux server (one of many on my program) to run bash.

Yes, my column one timestamp (converted over from columns 17-22ish) is in this format
"

Code:

2014/04/07 16:02:55

for the date April 7, 2014 or for the date July 4, 2014?"

Yes, My files are sorted in ascending order.

Thanks.

---------- Post updated at 09:16 AM ---------- Previous update was at 08:58 AM ----------

Like I mentioned in my original post, this code below almost worked, but it didn't yield the proper row from file one. The bold awk is what I needed changed. As you can see, I sorted off of a time column "21" that is in msec and a little more accurate, however, Stomps last two code examples seem to sort off of column 1 timestamp just fine.

Code:

#!/bin/bash
function f() { awk 'NR==1{h=$0; next} {print $0 "\t" h}' $1; }; sort -t"," -k21,21 <(f file1) <(f file2)  | 
  awk -F'\t' '$2!=p{print $2; p=$2; b++; c=1} !(b%2)||c&&c--{print $1}' > temp5

This was my result with this code, in which the "red" line is what the output was (not correct). The "green" line is what I needed (correct line)

Code:

TIMEFORMATTED,G_CCSDS_VERSION,G_CCSDS_TYPE,G_CCSDS_2HDR_FLAG,G_CCSDS_APID,G_CCSDS_GRP_FLAGS,G_CCSDS_SEQ_COUNT,G_CCSDS_PKT_LEN,G_CCSDS_DOY,G_CCSDS_MSEC
2014/04/07 16:02:55,0,0,1,572,3,0,1917,20550,57775339
2014/04/07 16:03:00,0,0,1,572,3,0,1917,20550,57780339
2014/04/07 16:03:05,0,0,1,572,3,0,1917,20550,57785339
2014/04/07 16:03:10,0,0,1,572,3,0,1917,20550,57790339
TIMEFORMATTED,CCSDS_VERSION,CCSDS_TYPE,CCSDS_2HDR_FLAG,CCSDS_APID,CCSDS_GRP_FLAGS,CCSDS_SEQ_COUNT,CCSDS_PKT_LEN,CCSDS_DOY,CCSDS_MSEC
2014/04/07 16:03:12,0,0,1,544,3,0,985,20550,57788894
2014/04/07 16:03:13,0,0,1,544,3,0,985,20550,57793894
2014/04/07 16:03:14,0,0,1,544,3,0,985,20550,57794894

TIMEFORMATTED,G_CCSDS_VERSION,G_CCSDS_TYPE,G_CCSDS_2HDR_FLAG,G_CCSDS_APID,G_CCSDS_GRP_FLAGS,G_CCSDS_SEQ_COUNT,G_CCSDS_PKT_LEN,G_CCSDS_DOY,G_CCSDS_MSEC
2014/04/07 16:03:15,0,0,1,572,3,0,1917,20550,57795339
TIMEFORMATTED,CCSDS_VERSION,CCSDS_TYPE,CCSDS_2HDR_FLAG,CCSDS_APID,CCSDS_GRP_FLAGS,CCSDS_SEQ_COUNT,CCSDS_PKT_LEN,CCSDS_DOY,CCSDS_MSEC
2014/04/07 16:03:15,0,0,1,544,3,0,985,20550,57795894

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