Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2006
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2006

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Null's not null?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg69416] Re: Null's not null?
  • From: "Jean-Marc Gulliet" <jeanmarc.gulliet at gmail.com>
  • Date: Mon, 11 Sep 2006 05:39:21 -0400 (EDT)
  • References: <ee0t74$b5m$1@smc.vnet.net> <45040422.2000205@gmail.com> <p06230903c12a4b792c82@171.66.188.107>

On 9/11/06, AES <siegman at stanford.edu> wrote:
> >What about using the \[Null] character [1], character that is not displayed?
> >
> >Table[If[Random[] < 0.5, 1, \[Null]], {10}]
> >
> >HTH,
> >Jean-Marc
> >
> >[1] _The Mathematica Book_, Section 3.10.5 "Structural Elements and
> >Keyboard Characters"
> >http://documents.wolfram.com/mathematica/book/section-3.10.5
>
>
> Thanks -- works great.  (Except: How can I edit it, if I can't see it
> in the Input cell?!?)

Pertinent question, indeed! I think the best way to edit such
invisible characters, \[Null] and alike, is to select the cell you
want to modify and use the sequence of keys Shift+Ctrl+ E (under
Windows) -- this will display the cell in a cell expression form --,
do the changes you want, then return to a normal form with the same
sequence of keys.

In[2]:=
Cell["\<\
Table[If[Random[] < 0.5, 1, \[Null]], {10}]\
\>", \
"Input",
  CellLabel->"In[2]:="]

Out[2]=
Cell["{\[Null], \[Null], \[Null], 1, \[Null], 1, 1, \[Null], \
1, \[Null]}", "Output",
  CellLabel->"Out[2]="]

Regards,
Jean-Marc


  • Prev by Date: Re: Null's not null?
  • Next by Date: Re: Re: Re: StylePrint and 2D strings
  • Previous by thread: some integrals containing BesselJ
  • Next by thread: Re: Null's not null?