This is a mirror of http://www.vim.org/scripts/script.php?script_id=670
The visincr plugin facilitates making a column of increasing or decreasing
numbers, dates, or daynames.
First, select a column using visual-block (ctrl-v) and move the cursor.
Second, choose what sort of incremented list you want:
 :I [#] Will use the first line's number as a starting point to build
 a column of increasing numbers (or decreasing numbers if the
 increment is negative).
 Default increment: 1
 Justification : left (will pad on the right)
 :II [# [zfill]] Will use the first line's number as a starting point
 to build a column of increasing numbers (or decreasing numbers
 if the increment is negative).
 Default increment: 1
 Justification : right (will pad on the left)
 Zfill : left padding will be done with the given
 character, typically a zero.
 :IYMD [#] year/month/day
 :IMDY [#] month/day/year
 :IDMY [#] day/month/year
 Will use the starting line's date to construct an increasing
 or decreasing list of dates, depending on the sign of the
 number.
 Default increment: 1 (in days)
 :ID [#] Will produce an increasing/decreasing list of daynames. Three-letter
 daynames will be used if the first day on the first line is a three
 letter dayname; otherwise, full names will be used.
 :IO [#]
 :IIO [#] [zfill]
 Like :I and :II, except visincr creates octal numbers.
 :IR [#]
 :IIR [#] [zfill]
 Like :I and :II, except visincr uses Roman numerals. Negative and
 zero counts are not supported for Roman numerals.
 :IX [#]
 :IIX [#] [zfill]
 Like :I and :II, except visincr creates hexadecimal numbers.
 -------------------
 EXTRA NOTES
 -------------------
 For :I :II :IO :IIO :IR :IIR :
 If the visual block is ragged on the right-hand side (as can
 easily happen when the "$" is used to select the
 right-hand-side), the block will have spaces appended to
 straighten it out. If the string length of the count exceeds
 the visual-block, then additional spaces will be inserted as
 needed. Leading tabs are handled by using virtual column
 calculations.
 For :IR and :IIR :
 Since Roman numerals vary considerably in their lengths for
 nearby numbers, an additional two spaces will be included.
 For :IYMD, :IMDY, and IDMY:
 You'll need the <calutil.vim> plugin, available as
 "Calendar Utilities" under the following url:
 http://mysite.verizon.net/astronaut/vim/index.html#CALUTIL
Help is included, too -- check out :he visincr-examples to see
even more examples of each command in action.
Examples:
 :I
 Use ctrl-V to
 Original Select, :I
 8 8
 8 9
 8 10
 8 11
 8 12
 :I -1
 Use ctrl-V to
 Original Select, :I -1
 8 8
 8 7
 8 6
 8 5
 8 4
 :II
 Use ctrl-V to
 Original Select, :II
 8 8
 8 9
 8 10
 8 11
 8 12
 :II -1
 Use ctrl-V to
 Original Select, :II -1
 8 8
 8 7
 8 6
 8 5
 8 4
 :IMDY
 Use ctrl-V to
 Original Select, :IMDY
 06/10/03 6/10/03
 06/10/03 6/11/03
 06/10/03 6/12/03
 06/10/03 6/13/03
 06/10/03 6/14/03
 :IYMD
 Use ctrl-V to
 Original Select, :IYMD
 03/06/10 03/06/10
 03/06/10 03/06/11
 03/06/10 03/06/12
 03/06/10 03/06/13
 03/06/10 03/06/14
 :IDMY
 Use ctrl-V to
 Original Select, :IDMY
 10/06/03 10/06/03
 10/06/03 11/06/03
 10/06/03 12/06/03
 10/06/03 13/06/03
 10/06/03 14/06/03
 :ID
 Use ctrl-V to
 Original Select, :ID
 Sun Sun
 Sun Mon
 Sun Tue
 Sun Wed
 Sun Thu
 :ID
 Use ctrl-V to
 Original Select, :ID
 Sunday Sunday
 Sunday Monday
 Sunday Tuesday
 Sunday Wednesday
 Sunday Thursday
 :IA
 Use ctrl-V to
 Original Select, :IA
 a a
 a b
 a c
 a d
 a e
 :IO
 Use ctrl-V to
 Original Select, :IO
 5 5 
 5 6 
 5 7 
 5 10
 5 11
 :IR
 Use ctrl-V to
 Original Select, :IR
 II II
 II III
 II IV
 II V 
 II VI
 Use ctrl-V to
 Original Select, :IX
 8 8
 8 9
 8 a
 8 b
 8 c
-------------
SEE ALSO
-------------
vis : vimscript#1195 : apply any ex command (ex. :s/../../) to a visual block
vissort : vimtip#588 : how to sort a visual block (or sort based on one)
visincr : http://mysite.verizon.net/astronaut/vim/index.html#VISINCR (for the latest, albeit experimental, release)