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Full Discussion: Inconsistent results using sort function
Top Forums UNIX for Beginners Questions & Answers Inconsistent results using sort function Post 303027265 by aberg on Wednesday 12th of December 2018 04:17:55 PM
Old 12-12-2018
Inconsistent results using sort function
Could you please advise on the following: I have two space-delimited files with 9 and 10 columns, respectively, with exactly the same values in column 1. However, the order of column 1 differs between the two files, so I want to sort both files by column 1, so that I can align them and concatenate them into a 19 column file.


If I want to sort by column 1, I usually use "sort -k 1,1 -g". I have done this hundreds of times and I have never had a problem with it.
This is the first time ever that the sort function has given a different output for the two files, despite using identical commands:

Code:
sort -k 1,1 -g file1.txt | head

rs1000000 12 126890980 G A 0.772687 0.999152 -6.53289e-05 0.000341777  
rs10000003 4 57561647 A G 0.298872 0.997534 -0.000308206 0.000313536 
rs10000005 4 85161558 G A 0.468352 0.994261 0.000392384 0.000287513 
rs10000010 4 21618674 T C 0.517001 0.986406 -0.000387116 0.000288364  
rs10000011 4 138223055 C T 0.957162 0.987603 -0.000466108 0.000710431  
rs10000012 4 1357325 C G 0.85952 0.999131 -0.000544182 0.000412222  
rs10000017 4 84778125 C T 0.777348 0.989758 0.00024644 0.000345697  
rs10000018 4 100458448 A G 0.707724 0.999129 -5.96813e-05 0.000315027  
rs10000021 4 159441457 G T 0.185355 0.99682 0.000127756 0.000369005  
rs1000002 3 183635768 C T 0.513401 1 -0.000269255 0.000286993 3.5E-01

and

Code:
sort -k 1,1 -g file2.txt | head 

rs10000003 G A 0.707825 1.010846 0.015580 0.980310 1.042333 0.490663
rs10000005 A G 0.550104 0.988740 0.014283 0.960744 1.017551 0.439681
rs1000000 G A 0.780117 0.987172 0.017380 0.953108 1.022454 0.471168 
rs10000010 C T 0.503288 1.009101 0.014611 0.980464 1.038574 0.537391 
rs10000011 C T 0.950554 0.997444 0.026380 0.945740 1.051976 0.924913 
rs10000012 C G 0.866931 0.966905 0.021645 0.924482 1.011276 0.141498 
rs10000017 C T 0.791953 1.003966 0.019870 0.965021 1.044483 0.844517 
rs10000018 A G 0.699162 1.006137 0.014434 0.977846 1.035245 0.674194 
rs10000021 T G 0.827782 0.991092 0.021206 0.949529 1.034474 0.682292 
rs10000023 T G 0.579281 1.024738 0.014014 0.997270 1.052962 0.077937

Why is this happening despite identical commands? I'm especially puzzled because I have never encountered this before.

Thank you for any advice.

aberg
 

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LEARN ABOUT OPENDARWIN

column

COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME

     column -- columnate lists

SYNOPSIS

     column [-tx] [-c columns] [-s sep] [file ...]

DESCRIPTION

     The column utility formats its input into multiple columns.  Rows are filled before columns.  Input is taken from file operands, or, by
     default, from the standard input.	Empty lines are ignored.

     The options are as follows:

     -c      Output is formatted for a display columns wide.

     -s      Specify a set of characters to be used to delimit columns for the -t option.

     -t      Determine the number of columns the input contains and create a table.  Columns are delimited with whitespace, by default, or with
	     the characters supplied using the -s option.  Useful for pretty-printing displays.

     -x      Fill columns before filling rows.

DIAGNOSTICS

     The column utility exits 0 on success, and >0 if an error occurs.

ENVIRONMENT

     COLUMNS  The environment variable COLUMNS is used to determine the size of the screen if no other information is available.

EXAMPLES

	   (printf "PERM LINKS OWNER GROUP SIZE MONTH DAY " ; 
	   printf "HH:MM/YEAR NAME
" ; 
	   ls -l | sed 1d) | column -t

SEE ALSO

     colrm(1), ls(1), paste(1), sort(1)

HISTORY

     The column command appeared in 4.3BSD-Reno.

BSD
								   June 6, 1993 							       BSD
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