vim中把用正则表达式匹配的字符串写到一个新文件的方法

redirect selected parts to a new file

　　1: :g/patten/y A Append to the

　　contents of the register if its name is given

　　uppercase {A-Z}

　　create a file in vim

　　"ap

　　2:delete unwanted lines

　　:g/^[^0-9]\+\n/d

　　3: :redir >> tmp

　　:g/^\d\+/p

　　:redir END

　　"send output of previous global command to a new window

　　:nmap <F5> :redir @a<CR>:g//<CR>:redir END<CR>:new<CR>:put! a<CR><CR>