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Top Forums UNIX for Dummies Questions & Answers Display latest record from file based on multiple columns combination Post 302938795 by tmalik79 on Thursday 19th of March 2015 03:40:00 AM
Old 03-19-2015
Display latest record from file based on multiple columns combination

I have requirement to print latest record from file based on multiple columns combination.
Code:
EWAPE EW1SLE0000 EW1SOMU01 ABORTED 03/16/2015 100004 03/16/2015 100005 001
EWAPE EW1SLE0000 EW1SOMU01 ABORTED 03/18/2015 140003 03/18/2015 140004 001
EWAPE EW1SLE0000 EW1SOMU01 ABORTED 03/18/2015 220006 03/18/2015 220014 001
EWAPE EW1SLE00_H EW1SOMU01 TIME_OVERRUN 03/12/2015 100000 03/12/2015 114500 001
EWAPE EW1SLE00_H EW1SOMU01 COMPLETED 03/16/2015 100001 03/16/2015 100003 001
EWAPE EW1SLE00_H EW1SOMU01 COMPLETED 03/18/2015 220000 03/18/2015 220005 001

Above is the sample data. Excepted output is given below. I was able to manage sorting the data but now I need to print latest record from file based on column 1,2,3,4,5 combination.
Code:
EWAPE EW1SLE0000 EW1SOMU01 ABORTED 03/18/2015 220006 03/18/2015 220014 001
EWAPE EW1SLE00_H EW1SOMU01 COMPLETED 03/18/2015 220000 03/18/2015 220005 001

Thanks,
Mallik.

Last edited by Scrutinizer; 03-19-2015 at 04:56 AM.. Reason: Formatting, code tags
 
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MINMAX(l)																 MINMAX(l)

NAME
minmax - Find extreme values in data tables SYNOPSIS
minmax [ files] [ -C ] [ -D ] [ -H[nrec] ] [ -Idx[/dy] ] [ -L ] [ -M[flag] ] [ -: ] [ -bi[s][n] ] DESCRIPTION
minmax reads its standard input [or from files] and finds the extreme values in each of the columns. It recognizes NaNs and will print warnings if the number of columns vary from record to record. As an option, minmax will find the extent of the first two columns rounded up and down to the nearest multiple of dx/dy. This output will be in the form -Rw/e/s/n which can be used directly in the command line for other programs, or simply in column form. xyzfile ASCII [or binary, see -b] file(s) holding a fixed number of data columns. OPTIONS
-C Report the min/max values per column in separate columns [Default uses <min/max> format] -D Sets longitude discontinuity to the Dateline (-180/+180) [Default is Greenwich (0-360)]. Requires -L. -H Input file(s) has Header record(s). Number of header records can be changed by editing your .gmtdefaults file. If used, GMT default is 1 header record. -I Report the min/max of the first two columns to the nearest multiple of dx and dy, and output this in the form -Rw/e/s/n (unless -C is set). -L Indicates that the x column contains longitudes, which may be periodic in 360 degrees [Default assumes no periodicity]. -M Multiple segment file(s). Segments are separated by a special record. For ASCII files the first character must be flag [Default is '>']. For binary files all fields must be NaN. -: Toggles between (longitude,latitude) and (latitude,longitude) input/output. [Default is (longitude,latitude)]. Applies to geo- graphic coordinates only. Only works when -I is selected. -bi Selects binary input. Append s for single precision [Default is double]. Append n for the number of columns in the binary file(s). [Default is 2 input columns]. EXAMPLES
To find the extreme values in the file ship_gravity.xygd, try minmax ship_gravity.xygd Output should look like ship_gravity.xygd: N = 6992 <326.125/334.684> <-28.0711/-8.6837> <-47.7/177.6> <0.6/3544.9> To find the extreme values in the file track.xy to the nearest 5 units and use this region to draw a line using psxy, try psxy `minmax -I5 track.xy` track.xy -Jx1 -B5 -P > track.ps To find the min and max values for each column, but rounded to integers, try minmax junkfile -C -I1 SEE ALSO
gmt(1gmt) 1 Jan 2004 MINMAX(l)

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