1. The problem statement, all variables and given/known data:
To sort a data
2. Relevant commands, code, scripts, algorithms:
The data provided is saved in dummy.txt and provided in LIBSVM format, but I think this information is redundant..
And we have to use functions cut, sort, or tr to sort the data. The sorted data should be in this form: (From my observation the data is only sorted by looking at the first field.)
but they both sorted the data using the second field as well..
4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
Purdue University West Lafayette USA
Prof. Vishy, STAT598
Moderator's Comments:
Do not use PHP code tags when the data is not PHP code.
I can't see a suitable "sort" command.
The output file is every line starting with "+1" in the order read followed by every line starting with "-1" in the order read.
One simple way to achive the output is to read the file twice, outputting first the "+1" records then the "-1" records.
Code:
for prefix in "+1" "-1"
do
cat dummy.txt | while read line
do
case "${line}" in
"${prefix}"*)
echo "${line}"
;;
esac
done
done
./scriptname
+1 1:2 2:4 4:3.2
+1 1:-6 2:-4 4:2.2
+1 1:2.98 2:5.6 4:8.1
-1 2:2.1 2:2.1 6:5.9
-1 1:9.6 2:6.3 6:5.8
-1 3:0.3 3:0.3 5:4.1
Last edited by methyl; 09-17-2010 at 08:40 AM..
Reason: correct input filename.
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... (6 Replies)
Hello there
i have a funny behiavor of the sort fonction, i try it out on different Solaris machine and i have the same issue.
So i would like to see if there is a rationel explanation
here is some data in a file:test.txt
,Test,RSD,RSD_Asset
,Test,RSD,RSD_Credit
,Test,RSD,RSD_Liab... (3 Replies)
Hi,
Can anyone tell me why the following program is giving compiler error when I use a friend function of a class as the comparison predicate for the third parameter of std::sort() algorithm? How to correct it, keep the 'friend' intact?
#include <iostream>
#include <vector>
#include <list>... (1 Reply)
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1. The problem statement, all variables and given/known data:
I must write a shell script that calls two external Perl functions--one of which sorts the data in a file, and... (6 Replies)
I want to sort unique values of column 2 that has the maximum value at column 7. this is my file and desired output
I have a file like this:
AD008 AD0081010180947 101018 0947 0950 1010180947 1010180950
AD008 AD0081010180947 101018 0947 0956 1010180947 1010180956
AD008 AD0081010180947... (12 Replies)
Hi,
I am new to PERL.I want to sort all the lines in a file based on 1,2 and 4th filelds.
Can U suggest me a command/function in perl for this operation.. (5 Replies)
Hey guys.
I am trying to sort a file by account number through UNIX. I have a few things but it seems to sort by account number AND sort everything after the account number.
Help please.
Thanks (5 Replies)
Hi,
here is my perl script.This script creates an array and is sorting it using the in-built sort function in perl.
#!/usr/local/bin/perl
my number=6;
my @num_arr=(1,2,3,4,5);
my @array=(23,"$number","Hello",2.345,@num_arr);
#printing the array
print... (2 Replies)
09-16-2010
