sed question: lower-to-upper case

[Maarten Litmaath]

klein at mechp10.UUCP (Greg Klein) writes:
\I would like to use sed to change certain (not all) words in a text file
\from lower case to upper case.  For example, the selected words to be
\changed might be all words that contain one or more lower case z's in
\them (like 'zebra').  Any ideas?

Sed is not very suitable for this task. :-(
Try the non-interactive variant of `ex' instead:

	ex - file <<\+
	%s/[a-zA-Z]*z[a-zA-Z]*/\U&/g
	x
	+

Explanation: substitute for every (maximal) sequence of letters, containing a
`z', its uppercase (`\U') `equivalent' (`&').
[`&' means: put here (a copy of) the string that was matched.]
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