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Re: Sneaky white space

  • To: mathgroup at smc.vnet.net
  • Subject: [mg113396] Re: Sneaky white space
  • From: John Fultz <jfultz at wolfram.com>
  • Date: Wed, 27 Oct 2010 05:14:54 -0400 (EDT)

On Tue, 26 Oct 2010 08:56:32 -0700 (PDT), Sam Takoy wrote:
> From: John Fultz <jfultz at wolfram.com>
> To: sam.takoy at yahoo.com; mathgroup at smc.vnet.net
> Sent: Tue, October 26, 2010 10:49:12 AM
> Subject: Re: [mg113388] Sneaky white space
> On Tue, 26 Oct 2010 05:35:41 -0400 (EDT), Sam Takoy wrote:
>> Hi,
>>
>> I'm working nicely along, when all of a sudden Mathematica tells me that
>> essentially it can't NIntegrate[Cos[a], {a, -Pi, Pi}]. After 30 minutes
>> of searching, I discover that I have an invisible TextCell[""] attached
>> to the expression.
>>
>> First of all, I don't know what I did to put it there. What DID I do?
>> Some inadvertent Ctrl-Key combination?
>>
>> Second, TextCell[""] is mostly invisible and hard to find. Is there a
>> way to make it visible or to find it more easily?
>>
>> Many thanks in advance,
>>
>>
>> Sam
>>
> It's hard to offer any definitive comments without knowing more about wha=
t
> happened, but I'll offer a bit of speculation.
>
> Possibly you may have accidentally pressed Ctrl+9 at some point while
> editing
> the input?  Or maybe this got snagged as part of
> some copy/paste operation.  Did
> you maybe copy the template from the help viewer?  Or copy output from
> some
> other input you had involving TextCell?
>
> A TextCell which is truly empty ought to disappear on its own unless it
> was
> created by evaluating TextCell[].  It also wouldn't go away if it had
> spaces in
> it.
>
> Sincerely,
>
> John Fultz
> jfultz at wolfram.com
> User Interface Group
> Wolfram Research, Inc.
>
>
> Thank you. I may have done one of those things, but didn't TextCell
> anywhere. Perhaps, Print[] is related?
>
>
> And also, I guess my question is - is it possible to make a TextCell
> visible? Like set it's background to red or border to another color?
>
>
> Thanks again,
>
>
> Sam

I can't think of an easy way off the top of my head.  Sorry.

Sincerely,

John Fultz
jfultz at wolfram.com
User Interface Group
Wolfram Research, Inc.


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