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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 302979254 by stomp on Thursday 11th of August 2016 04:43:19 PM
Old 08-11-2016
Line 3,4 and 5 of File2 have different Timestamps. What if there are different timestamps nearest to different lines?

Example

Code:
0 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 
1 2014/04/07 16:03:15,0,0,1,572,3,0,1917,20550,57795339 
2 2014/04/07 16:03:16,0,0,1,572,3,0,1917,20550,57795339 
3 2014/04/07 16:03:17,0,0,1,572,3,0,1917,20550,57795339  
4 TIMEFORMATTED,CCSDS_VERSION,CCSDS_TYPE,CCSDS_2HDR_FLAG,CCSDS_APID,CCSDS_GRP_FLAGS,CCSDS_SEQ_COUNT,CCSDS_PKT_LEN,CCSDS_DOY,CCSDS_MSEC 
5 2014/04/07 16:03:15,0,0,1,544,3,0,985,20550,57795894  
6 2014/04/07 16:03:16,0,0,1,544,3,0,985,20550,57796894  
7 2014/04/07 16:03:17,0,0,1,544,3,0,985,20550,57797894

Here line 1 timestamp of File1 is matching exactly line 5 of File2.
line 2 / File1 matching line 6 / File2
line 3 / File1 matching line 7 / File2

Which one is correct line to choose from file1 for file2?

Quote:
Sorry for the confusion. It is difficult to explain this.
No problem. Lots of fun puzzling for a solution Smilie
 

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PX_DATE2STRING(3)														 PX_DATE2STRING(3)

px_date2string - Converts a date into a string.

SYNOPSIS
string px_date2string (resource $pxdoc, int $value, string $format) DESCRIPTION
Turns a date as it stored in the paradox file into human readable format. Paradox dates are the number of days since 1.1.0000. This func- tion is just for convenience. It can be easily replaced by some math and the calendar functions as demonstrated in the example below. PARAMETERS
o $pxdoc - Resource identifier of the paradox database as returned by px_new(3). o $value - Value as stored in paradox database field of type PX_FIELD_DATE. o $format - String format similar to the format used by date(3). The placeholders support by this function is a subset of those supported by date(3) (Y, y, m, n, d, j, L). RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Turn a paradox date into a human readable form <?php $px = px_new(); /* make up a date as it could be stored in */ /* a date field of a paradox db. */ /* 700000 days since 1.1.0000. */ $days = 700000; /* Use the calendar functions to print a */ /* human readable format of the date */ echo jdtogregorian($days+1721425)." "; /* px_date2string() outputs the same */ echo px_date2string($px, $days, "n/d/Y")." "; px_delete($px); ?> The above example will output: 7/15/1917 7/15/1917 SEE ALSO
px_timestamp2string(3), jdtogregorian(3). PHP Documentation Group PX_DATE2STRING(3)
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