Collapse out all lines not matching "/pattern"?

In regular/normal vim editing, is there a method to collapse out of view
all lines NOT matching "/pattern"?

Though I use vimdiff a lot, the only relevance to vimdiff is the way it
collapses out lines not relevant to the differentiation process.  So, when
I'm using regular VIM, I'm wondering if there's a way to search for
"/pattern" ---and--- only see matching lines?  I also tend to have line
numbers on a lot, which would greatly help me to focus on certain things.

Thank you.

R,
-Joe Wulf

-- 
-- 
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php

--- 
You received this message because you are subscribed to the Google Groups "vim_use" group.
To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
To view this discussion visit https://groups.google.com/d/msgid/vim_use/CAJ8cad-ZE6mtPDe0_zv3PFDUmnq%2BOKN5fbcLg%3DutGfpSj6braQ%40mail.gmail.com.