I have a file that has a pattern 2 lines, blanktwo line
If encountering the first line, the 2nd line need to be converted to UPPERCASE...or...conver the 2nd line after ablank into uppercase
Is there a 'tr' function in awk..(probably the best tool over sed) ?
i.e.
......................
a
b
c
d
e
f
.................
becomes...
.................
a
B
c
D
e
F
Try:
awk 'f{gsub(/[[:lower:]]/,toupper($0));f=0};NF{f=1}1' file
Try:
awk '{$2=toupper($2)}1' RS= ORS='\n\n' FS='\n' OFS='\n' file
--
fix for pilnet101's approach:
awk 'f{gsub($0,toupper($0));f=0};NF{f=1}1' file
or better:
awk 'f{$0=toupper($0);f=0}; NF{f=1}1' file
Of these 3 suggestions, I think #3 is the most robust, since it does not use regex while the input file may contain special characters (#2), nor does it depend on the empty line being completely empty (no whitespace) + does it leave a trailing empty line at the end of the file (#1)..
Hello stevie_velvet,
Please use code tags as per foum rules for your commands/codes/Inputs into your post, could you please try following and let me know if this helps.
awk '!NF{A=toupper(A);i++;next} {A[++i]=$0} END{if(A){A=toupper(A)};for(j=1;j<=i;j++){print A[j]}}' Input_file
Output will be as follows.
a
B
c
D
e
F
Thanks,
R. Singh
Print uppercase if previous line had fields (was not empty)
awk '{print pnf?toupper($0):$0; pnf=NF}'
I'm not quite sure what "I have a file that has a pattern 2 lines, blanktwo line" means. I would have thought that blanktwo line meant that there would be two blank lines, but I don't see any examples of that in the sample input file. The following will set all lowercase characters on the second non-blank line in each set of non-blank lines separated by one or more blank lines:
awk '++n==2{$0=toupper($0)} !NF{n=0} 1' file
If file contains:
a
b
c
d
e
f
g
h
i
j
k
l
m
n
it produces the output:
a
B
c
D
e
F
g
h
I
j
k
L
m
n
Hi.
I'm assuming that the file format is: "2 lines, blank [line], 2 lines, blank [line] ... " However, I am not sure if the awk was a requirement or not. If so, then there are a number of awk solutions above; if not, then here are a few alternatives:
#!/usr/bin/env bash
# @(#) s1 Demonstrate UPPERCASE specific lines, sed.
# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C sed perl pass-fail
FILE=${1-data1}
E=expected-output.txt
pl " Input data file $FILE:"
cat $FILE
pl " Expected output:"
cat $E
# GNU sed, address: first~step
# Match every step'th line starting with line first.
# man sed
#
# sed 's/\(.*\)/\L\1/' # but use "U" for uppercase
# http://stackoverflow.com/questions/4569825/sed-one-liner-to-convert-all-uppercase-to-lowercase
pl " Results, GNU sed "s":"
sed '2~3s/\(.*\)/\U\1/' $FILE
pl " Results, GNU sed "s", extended RE, more readable:"
sed -r '2~3s/(.*)/\U\1/' $FILE
pl " Results, GNU sed "s", extended RE, '&' = whatever is matched:"
sed -r '2~3s/.*/\U&/' $FILE
pl " Results, GNU sed "y":"
sed '2~3y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' $FILE
pl " Results, perl:"
perl -wp -e 'BEGIN{$p=2};if ( $. == $p ) { y/[a-z][A-Z]/[A-Z][a-z]/; $p += 3; }' $FILE |
tee f1
# Check final result automatically.
pass-fail
exit 0
producing:
$ ./s1
Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution : Debian 8.4 (jessie)
bash GNU bash 4.3.30
sed (GNU sed) 4.2.2
perl 5.20.2
pass-fail - ( local: RepRev 1.6, ~/bin/pass-fail, 2016-07-23 )
-----
Input data file data1:
a
b
c
d
e
f
-----
Expected output:
a
B
c
D
e
F
-----
Results, GNU sed s:
a
B
c
D
e
F
-----
Results, GNU sed s, extended RE, more readable:
a
B
c
D
e
F
-----
Results, GNU sed s, extended RE, '&' = whatever is matched:
a
B
c
D
e
F
-----
Results, GNU sed y:
a
B
c
D
e
F
-----
Results, perl:
a
B
c
D
e
F
-----
Comparison of 8 created lines with 8 lines of desired results:
Succeeded -- files (computed) f1 and (standard) expected-output.txt have same content.
Best wishes ... cheers, drl