Re: Gnuplot and the dollar sign

[Janne Junnila <janne.junnila@gmail.com>]

Thank you for your reply!

I was actually able to find a workaround for my problem at least in
this case. Digging through the gnuplot documentation revealed that
instead of using $n to refer to the column n in a data file one can
also use column(n). The ConTeXt parser accepts this of course.

Janne Junnila

On Sat, Jan 28, 2012 at 12:23 PM, Mojca Miklavec
<mojca.miklavec.lists@gmail.com> wrote:
> On Sat, Jan 28, 2012 at 09:16, Janne Junnila wrote:
>> Hi!
>>
>> I'm having trouble while trying to make the following work:
>>
>> \usemodule[gnuplot]
>>
>> \startGNUPLOTscript[distr_simple_1]
>>
>> plot "2_simple_1.out" using
>> (0.01*floor($1/0.01)):(0.870456/100000/0.01) smooth frequency with
>> boxes, (cos(2*x)*sin(0.5*x) + 1)*exp(-0.4*x)
>> \stopGNUPLOTscript
>>
>> \useGNUPLOTgraphic[distr_simple_1]
>>
>> The problem seems to be that the single dollar sign gets interpreted
>> as the start of a math environment.
>
> On one hand that is the intended default behaviour. It is very handy
> to be able to use
>
> plot (cos(2*x)*sin(0.5*x) + 1)*exp(-0.4*x) title '$\left(\cos(2x)
> \cdot \sin(0.5x)\right+1) e^{-0.4x}$'
>
> to get nice result. On the other hand I'm not exactly sure how to
> reliably print whatever gets passed to ConTeXt. The only option that
> comes to my mind is some modification of
>    \sometxt{\starttyping floor($1/0.01) \stoptyping}
> where \starttyping would generate a single line. But one would need a
> special option for that. (The command \type{...} would not be reliable
> enough: in MKII it stops working at the second underscore and it is a
> problem if one has curly braces in text.)
>
>> I tried to look through the source
>> code to see how I could tell context to bypass checking for certain
>> characters, but I couldn't figure it out.
>
> Currently the only option is to provide an explicit title. But if
> there's a request to support literal output and if somebody can help
> me figure out how exactly I should output the given text into
> metapost, so that it will be reliably printed out literally.
>
> Mojca
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