Change Case UPPER-lower & lower - UPPER

rahulkav · #1 (**permalink**) 09-12-2008

Hi All,

I have a wrongly typed file i.e. Upper case letters are typed as lower and vice cerse i.e. "tHIS IS AN unix FORUM." I would like to do a conversion such that out out should be This is an UNIX forum' I would like to do in shell script . Any pointers? I know that we can use tr -s or typeset but using those I am able to convert either in either all lower or all upper.

Can we do this using awk by taking each character in a array and converting.

Any help will be hightly appreciated.

cheers,

zaxxon · #2 (**permalink**) 09-12-2008

Not pretty but works:

Code:

sed 'y/abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz/'

A shorter/more elegant version would be interessting.

unknown123 · #3 (**permalink**) 09-12-2008

try below code:

tr -s '[a-z][A-Z]' '[A-Z][a-z]' <input_file >output_file

it works fine for me...

let me know if you still face any issues.

enjy................

dennis.jacob · #4 (**permalink**) 09-12-2008

Quote:

Originally Posted by unknown123

try below code:

tr -s '[a-z][A-Z]' '[A-Z][a-z]' <input_file >output_file

it works fine for me...

let me know if you still face any issues.

enjy................

It will work even without -s

Franklin52 · #5 (**permalink**) 09-12-2008

While this will work perfectly on most systems, it is not portable to all systems.

Code:

/home/franklin >uname -a
HP-UX csu02 B.11.00 A 9000/800 126484691 two-user license

/home/franklin >tr -s '[a-z][A-Z]' '[A-Z][a-z]' etik                         
tr: The combination of options and String parameters is not legal.
Usage: tr [ -c | -cds | -cs | -ds | -s ] [-A] String1 String2
       tr [ -cd | -cs | -d | -s ] [-A] String1

Code:

/home/franklin >tr '[a-z][A-Z]' '[A-Z][a-z]' etik                         
tr: The combination of options and String parameters is not legal.
Usage: tr [ -c | -cds | -cs | -ds | -s ] [-A] String1 String2
       tr [ -cd | -cs | -d | -s ] [-A] String1

Regards

mahendrt · #6 (**permalink**) 09-12-2008

Quote:

Originally Posted by unknown123

try below code:

tr -s '[a-z][A-Z]' '[A-Z][a-z]' <input_file >output_file

it works fine for me...

let me know if you still face any issues.

enjy................

This works fine for me, mine is AIX

summer_cherry · #7 (**permalink**) 09-14-2008

Code:

cat filename | tr "[:upper:][:lower:]" "[:lower:][:upper:]"

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