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I am reading values of different variables from a SLHA file and putting value of each variable in a dedicated file using shell script. I have around 50 such variables so 50 data files are generated. A portion of the code is given below-

 grep "        25" SPheno.spc|head -1|awk {'print $2'} >> mh.out
 grep "   1000001" SPheno.spc|head -1|awk {'print $2'} >> mdl.out
 grep "   2000001" SPheno.spc|head -1|awk {'print $2'} >> mdr.out
 grep "   1000002" SPheno.spc|head -1|awk {'print $2'} >> mul.out
 grep "   2000002" SPheno.spc|head -1|awk {'print $2'} >> mur.out
 .
 .
 .

I want to merge all of these .out files from the shell itself in a single grand file such that there are separate columns for each variable in the combined file. I tried to use c++ but opeing such large number of files does not appear efficient.

  • You call grep, head and awk 50 times each instead of calling awk once? And you are worried about efficiency...? – Hauke Laging Aug 22 '17 at 18:11
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cat m*.out >combined_file.out
  • I want separate columns for each variable in the combined file. This command will just put everything in a single column. – solphy101 Aug 22 '17 at 18:17
  • @solphy101 And would you claim that a reasonable reader can take this from your question? – Hauke Laging Aug 22 '17 at 18:18
  • Let me edit the question. – solphy101 Aug 22 '17 at 18:20
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paste m*.out > combined_file

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