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Full Discussion: Adding a prefix to a column using awk/sed commands
Operating Systems Linux Adding a prefix to a column using awk/sed commands Post 302483891 by R0H0N on Wednesday 29th of December 2010 01:04:03 AM
Old 12-29-2010
Input
Code:
$ cat file
1	.	miRNA	548816	548893	.	+	.	ACC="MI0002023"; ID="dre-mir-155";
1	.	miRNA	1651461	1651541	.	+	.	ACC="MI0002180"; ID="dre-mir-459";
1	.	miRNA	23269491	23269603	.	-	.	ACC="MI0004786"; ID="dre-mir-740";
1	.	miRNA	27656240	27656327	.	+	.	ACC="MI0002052"; ID="dre-mir-218a-2";
1	.	miRNA	34527751	34527843	.	+	.	ACC="MI0004780"; ID="dre-mir-734";
1	.	miRNA	40174414	40174523	.	+	.	ACC="MI0010857"; ID="dre-mir-2197";
1	.	miRNA	46862496	46862635	.	-	.	ACC="MI0001895"; ID="dre-mir-16b";
str .	miRNA	46862739	46862822	.	-	.	ACC="MI0001891"; ID="dre-mir-15a-1";
1	.	miRNA	55355143	55355233	.	-	.	ACC="MI0004765"; ID="dre-mir-722";
2	.	miRNA	1085488	1085564	.	+	.	ACC="MI0002181"; ID="dre-mir-460";
2	.	miRNA	6031391	6031475	.	+	.	ACC="MI0002000"; ID="dre-mir-137-1";
str .	miRNA	22105590	22105669	.	-	.	ACC="MI0004782"; ID="dre-mir-736";
2	.	miRNA	23568780	23568883	.	-	.	ACC="MI0010841"; ID="dre-mir-2190";
2	.	miRNA	25338635	25338716	.	-	.	ACC="MI0001966"; ID="dre-mir-124-1";
2	.	miRNA	31878456	31878533	.	+	.	ACC="MI0001916"; ID="dre-mir-23a-3";
2	.	miRNA	31880346	31880476	.	+	.	ACC="MI0001928"; ID="dre-mir-27a";
2	.	miRNA	34798348	34798457	.	+	.	ACC="MI0010847"; ID="dre-mir-2198";
2	.	miRNA	44164796	44164904	.	-	.	ACC="MI0001366"; ID="dre-mir-181b-1";
2	.	miRNA	57907954	57908073	.	-	.	ACC="MI0001879"; ID="dre-mir-7a-3";

Command
Code:
sed 's/^\([0-9].*\)/char \1/g' file

Output
Code:
char 1	.	miRNA	548816	548893	.	+	.	ACC="MI0002023"; ID="dre-mir-155";
char 1	.	miRNA	1651461	1651541	.	+	.	ACC="MI0002180"; ID="dre-mir-459";
char 1	.	miRNA	23269491	23269603	.	-	.	ACC="MI0004786"; ID="dre-mir-740";
char 1	.	miRNA	27656240	27656327	.	+	.	ACC="MI0002052"; ID="dre-mir-218a-2";
char 1	.	miRNA	34527751	34527843	.	+	.	ACC="MI0004780"; ID="dre-mir-734";
char 1	.	miRNA	40174414	40174523	.	+	.	ACC="MI0010857"; ID="dre-mir-2197";
char 1	.	miRNA	46862496	46862635	.	-	.	ACC="MI0001895"; ID="dre-mir-16b";
str .	miRNA	46862739	46862822	.	-	.	ACC="MI0001891"; ID="dre-mir-15a-1";
char 1	.	miRNA	55355143	55355233	.	-	.	ACC="MI0004765"; ID="dre-mir-722";
char 2	.	miRNA	1085488	1085564	.	+	.	ACC="MI0002181"; ID="dre-mir-460";
char 2	.	miRNA	6031391	6031475	.	+	.	ACC="MI0002000"; ID="dre-mir-137-1";
str .	miRNA	22105590	22105669	.	-	.	ACC="MI0004782"; ID="dre-mir-736";
char 2	.	miRNA	23568780	23568883	.	-	.	ACC="MI0010841"; ID="dre-mir-2190";
char 2	.	miRNA	25338635	25338716	.	-	.	ACC="MI0001966"; ID="dre-mir-124-1";
char 2	.	miRNA	31878456	31878533	.	+	.	ACC="MI0001916"; ID="dre-mir-23a-3";
char 2	.	miRNA	31880346	31880476	.	+	.	ACC="MI0001928"; ID="dre-mir-27a";
char 2	.	miRNA	34798348	34798457	.	+	.	ACC="MI0010847"; ID="dre-mir-2198";
char 2	.	miRNA	44164796	44164904	.	-	.	ACC="MI0001366"; ID="dre-mir-181b-1";
char 2	.	miRNA	57907954	57908073	.	-	.	ACC="MI0001879"; ID="dre-mir-7a-3";

See in the output, the starting string 'str' doesn't replaced with 'char'
R0H0N
 

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