# [LON-CAPA-users] Algebra Expression Rendering in LON-CAPA

Gerd Kortemeyer kortemey at msu.edu
Fri Jan 13 11:15:43 EST 2017

Hi,

Ah, okay, it’s inside Perl double quotes! Sorry, I did not catch that. In Perl, “\” is the escape character, so you’ll need “\\” - an escaped backslash.

Apologies, I didn’t make the connection the first time around.

- Gerd.

> On Jan 13, 2017, at 11:05 AM, Harding, Gene L <glhardin at purdue.edu> wrote:
>
> Hi,
>
> I think the formatting may be different inside a function assignment. This is what I get when I use the following syntax:
> $function = "$numer/$denom [pi + \sum_{n=1}^{\infty}($sum_numer/($sum_denom_n_coeff n -$sum_denom_const))*sin($w nt)]"; > <image001.png> > Did I mess up the syntax? > > > Gene L. Harding, PE > Associate Professor of ECET > 574-520-4190 > Purdue University-South Bend > > -----Original Message----- > From: lon-capa-users-bounces at mail.lon-capa.org [mailto:lon-capa-users-bounces at mail.lon-capa.org] On Behalf Of Gerd Kortemeyer > Sent: Friday, January 13, 2017 10:39 AM > To: Discussion list for LON-CAPA users <lon-capa-users at mail.lon-capa.org> > Subject: Re: [LON-CAPA-users] Algebra Expression Rendering in LON-CAPA > > Hi, > > It’s \sum > > as in > > \sum_{n=1}^{\infty} > > - Gerd. > > > On Jan 13, 2017, at 10:29 AM, Harding, Gene L <glhardin at purdue.edu> wrote: > > > > Hi, > > > > I am having trouble rendering an algebraic expression with a summation sign (capital Sigma). I want an expression that looks like this, using variables for the numeric portions of the expression: > > <image003.jpg> > > I am able to render the integration sign using this code: > >$function = "$numer/$denom  [pi + int($sum_numer/($sum_denom_n_coeff n
> > - $sum_denom_const),1,3)*sin($w nt)]"; …providing an expression that looks like this:
> > <image004.png>
> >
> > But when I try to render the summation sign using this code:
> > $function = "$numer/$denom [pi + sum($sum_numer/($sum_denom_n_coeff n > > -$sum_denom_const),n,1,3)*sin(\$w nt)]"; …I get the following:
> > <image005.png>
> >
> > I have spent a couple of hours looking through the Maxima Manual and other references, as well as some examples I have found online, but have not been able to figure out the syntax for rendering the summation sign. Can anyone offer advice on how to do this?
> >
> > Also, although not so important, if someone can tell me how to replace the outer parentheses with square brackets, and/or how to display the numeric part of the sine argument with commas (e.g., 90,000 vs 90000), I would really appreciate it.
> >
> > Thanks,
> >
> > Gene L. Harding, PE
> > Associate Professor of ECET
> > 574-520-4190
> > Purdue University-South Bend
> >
> > _______________________________________________
> > LON-CAPA-users mailing list
> > LON-CAPA-users at mail.lon-capa.org
> > http://mail.lon-capa.org/mailman/listinfo/lon-capa-users
>
> --
> Gerd Kortemeyer, Ph.D.
> Associate Professor of Physics
> Director, LON-CAPA Project
> Michigan State University
> http://www.msu.edu/user/kortemey/
>
>
>
>
> _______________________________________________
> LON-CAPA-users mailing list
> LON-CAPA-users at mail.lon-capa.org
> http://mail.lon-capa.org/mailman/listinfo/lon-capa-users
> _______________________________________________
> LON-CAPA-users mailing list
> LON-CAPA-users at mail.lon-capa.org
> http://mail.lon-capa.org/mailman/listinfo/lon-capa-users

--
Gerd Kortemeyer, Ph.D.
Associate Professor of Physics
Director, LON-CAPA Project
Michigan State University
http://www.msu.edu/user/kortemey/