Making the output look nicer.

[Ahri-man]

I am using the Wolfram Engine + WLJS desktop app.

If I run the following commands:

    Integrate[Sqrt[x + Sqrt[x]], x];
    TeXForm[%];
    CellView["$$"<>%<>"$$", "Display"->"markdown"]

I get a nicely formatted output in the WLJS desktop app.

Why don't the developers make this output the default one? Will an update address this issue?

I want to define a function named ShowTeX[Command[...]]and paste it in my init.m file. so that whenever I run ShowTeX[Command[...]], the output of Command[...] is the nice version.

How do I define this function? Where should I define it?

[JerryI]

Hi @Ahri-man

Why don't the developers make this output the default one? Will an update address this issue?

LaTeX form is limited to math equations only, while Wolfram Language output can be images, rows of images, equations mixed with other objects, sound, video and etc. Following the notebook structure of, let's say - Mathematica, we need to make sure, that the output can be copied or edited and still be a valid input form.

Therefore we can only progressively improve the current output format, while TeX output shown in your code snippet can be optional and defined by a user for a specific task they have.

How do I define this function? Where should I define it?

One can put it to init.m file

FileNameJoin[{$UserBaseDirectory,"Kernel"}] // SystemOpen

then

(** User initialization file **)

System`ShowTeX[expr_] := System`CellView["$$"<>TeXForm[expr]<>"$$", "Display"->"markdown"]

After the restart

[Ahri-man]

OK, I found some bugs:

in the first case, ShowTeX[] should output EllipticF instead of just F.
in the second case, ShowTeX[] outputs the Latex code ?
in the third case, ShowTeX[] outputs the Latex code ?

[JerryI]

I guess KaTeX, that we are using to render LaTeX, does not support array env. Anyway, I don't believe that WL always outputs "good" LaTeX code.

In the new version of WLJS Notebook we introduced MMAView, which bypasses WLJS StandardForm and outputs a rasterized expression using Mathematica's renderer