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://www.drchip.org/astronaut/vim/index.html#VISINCR (for the latest, albeit experimental, release)