MathJax - 2019-12-07

Martin Sleziak

7:31 AM

@MartinSleziak I have edited that post, the separators are shown now.

Martin Sleziak

12:18 PM

0

Q: Why the bracket(s) disappear?

I tried all the ways before asking the question here. I've tried all the ways I know. I'm having a problem like this. I'm looking for a way to transform equations written in MathJax into pictures in high resolution. I found this site: The problem is exactly:( a similar example) F(x):= \begin{c...

The web page you are using to create these images does not use MathJax. According to the page itself it "is a PHP implementation of the tex2im bash script created by Andreas Reigber". As such, I don't see what this has to do with Math.SE or Stack Exchange in general. You should contact that page's owner about problems with that page. — sie es er 3 hours ago

It seems that OPs original problem was to convert formula to a picture.

Personally I have used GhostScript in the past to convert eps to png.

gswin32c -dSAFER -dBATCH -dEPSCrop -dNOPAUSE -r600 -sDEVICE=pnggray -sOutputFile=%1.png "%1.eps"

gswin32c -dSAFER -dBATCH -dEPSCrop -dNOPAUSE -r600 -sDEVICE=png16m -sOutputFile=%1.png "%1.eps"

GhostScript has other options that can be chosen as sDEVICE.

It's possible that you can find some posts about using GS on TeX - LaTeX: How to convert pgfplots to high quality PNG file with Ghostscript?

And probably also on converting LaTeX output to images in general.

Maybe you can search among the questions tagged conversion+png.

Or you could also ask in TeX chatroom.

BTW it seems that so far the user who saw your question in the close votes review queue voted to leave open: math.meta.stackexchange.com/review/close/4620

I guess that your original problem was the question how to convert LaTeX/MathJax to an image. I'd guess that this might be possibly a question for TeX - LaTeX. I left a few short comments in the MathJax chatroom. — Martin Sleziak 1 min ago

Martin Sleziak

12:57 PM

@MartinSleziak ghostscript.com should I convert through this site? — Elementary 1 min ago

@Elementary I think that if we want to continue this discussion, it's probably better here in chat than in comments.

And, as I said, people around the TeX - LaTeX site will probably be able to give you better advice than me.

In any case, if I have something which I can convert to eps (for example, output from LaTeX), I did it using Ghostscript as described above.

Which means that I downloaded and installed Ghostscript (and also GSview).

After that I was able to run the commands such as the ones I have shown above.

Maybe I should also mention that I am working on Windows.

Elementary

1:17 PM

@MartinSleziak I'm sorry, yes, I understand. But I do not receive notification when you answer me. That's why I didn't write it here.

Martin Sleziak

I have asked also in the TeX chatroom, we'll see whether we get some response there.

Of course, it might be useful it you explain there more clearly what is actually the problem you're trying to solve.

Are you looking simply for some solution to convert your LaTeX document (or some formula from a LaTeX document) to an image?

Possibly answer to this question might contain some suggestions: Compile a LaTeX document into a PNG image that's as short as possible

Elementary

@MartinSleziak Thank you for helping me. I tried to find the site myself. Because I was afraid my question would be closed if I asked directly about the site.

Martin Sleziak

The top voted answer recommends ImageMagick:

> To convert it to a PNG I recommend to use the convert command of Image Magick:

> pdflatex file

> convert -density 300 file.pdf -quality 90 file.png

So it seems that I got the same recommendation in the TeX chatroom:

in TeX, LaTeX and Friends, 1 min ago, by Joseph Wright

209

Q: Compile a LaTeX document into a PNG image that's as short as possible

I need to convert my LaTeX documents into PNG. The problem is, I also need the resulting image to be as short as possible (height-wise). I've tried latex followed by dvipng, but the result is always the size of a page. For instance, take a .tex file containing: \documentclass{article} \begin{d...

graphics formatting conversion scaling

So probably that post might be worth reading.

Elementary

@MartinSleziak Yes. I've been trying for days to convert the equation I wrote in MathJax into a high resolution image. I will do everything you say. I hope I can.

Martin Sleziak

Just to clarify, can you write the same thing in LaTeX rather than MathJax?

Because what I wrote above is mainly about converting LaTeX output (typically pdf, possibly ps or dvi) into an image.

Or maybe I should have simply asked whether you can get your equation into pdf.

Elementary

1:38 PM

@MartinSleziak I tried Latex. I only know some commands. Unfortunately, I couldn't write the equation in latex. Because it's so big and complicated. Yes, the truth is, if I knew Latex well, I would print PDF. I wouldn't have to look for an image converter.

Martin Sleziak

So let's try to do this in LaTeX together.

@Elementary You want the file which contains nothing, only this single formula?

Elementary

@MartinSleziak I downloaded MikTek. I get errors. Yes, it is very difficult to do it alone without education.

@MartinSleziak can we really do it?

Martin Sleziak

Yes, just give me a few minutes.

Elementary

@MartinSleziak Of course.

Martin Sleziak

Overleaf is one of online systems for LaTeX (so that you don't have to install it locally): Compiling documents online

I have tried to put your equation there - I have removed some parts since I was getting errors. You can see the output here: overleaf.com/read/ggpngvvjffvb

And I have added now the second formula - where I simply copied your formula, but added \left. and \right. where needed.

The problem with your formula was unpaired \left and \right.

For example the first line in your cases environment was: `\frac 12 \left[A_1(x)+B_1(x)+C_1(x)+D_1(x)+E_1(x)+ \`

It contains \left but no \right.

So I changed it to: `\frac 12 \left[A_1(x)+B_1(x)+C_1(x)+D_1(x)+E_1(x)+\right. \\

Now there is the right delimiter which corresponds to the \left delimiter.

From the link I put about you should be able to view output and also download the pdf.

And you can also download the LaTeX source.

Elementary

2:00 PM

@MartinSleziak Spectacular!. I'll do the rest myself. I'll leave it here if I have a problem. Thank you for your time. Endless Thanks!

Martin Sleziak

And here is another link: overleaf.com/7996647568spcmjwqqxdbg With this link you should be able also to edit the source code.

For editing, overleaf will ask you to register. But that might be useful anyway.

Overleaf might be useful for two reasons.

1. You can edit LaTeX documents and you don't have to install LaTeX locally.

2. If you run into troubles, you have easy way to share the documents with somebody else. (Even allow somebody else to edit the document, when that's needed.)

BTW if you still wish to use the site you've mentioned in the post on meta, I think it would be worth trying whether you get what you expected if you add \left. and \right. in the right places so that they are paired.

In fact, if the linked site is not too complicate to use, I might try that myself.

Elementary

@MartinSleziak Dear Teacher, Can I ask Why did you help me? Because if sometimes it is not possible to gain reputation, nobody is willing to help...

Martin Sleziak

It seems that it worked.
[Here is the link](http://rogercortesi.com/eqn/index.php?filename=&latextext=%28x%29%3A%3D+%5Cbegin%7Bcases%7D+%5Cfrac+12++%5Cleft%5BA_1%28x%29%2BB_1%28x%29%2BC_1%28x%29%2BD_1%28x%29%2BE_1%28x%29%2B%5Cright.++%5C%5C+%5Cleft.%2BM_1%28x%29%2BN_1%28x%29%2BK_1%28x%29%2BP_1%28x%29%2BQ_1%28x%29%5Cright%5D%2C++x+%5Cgeq+0+%5C%5C+%5C%5C++%5Cfrac+12+%5Cleft%5BA_2%28x%29%2BB_2%28x%29%2BC_2%28x%29%2BD_2%28x%29%2BE_2%28x%29%2B%5Cright.++%5C%5C%0D%0A%5Cleft.%2BM_2%28x%29%2BN_2%28x%29%2BK_2%28x%29%2BP_2%28x%29%2BQ_2%28x%29+%5Cright%5D%2C+x+%3C+0+%5Cend%7Bcases%7D&outtype=png&bgcol…

TBH I don't share the viewpoint that people who answer questions on sites such as TeX - LaTeX or Mathematics have reputation as their primary motivation.

The question why somebody did something is probably typically a question for a professional therapist. (If you ask somebody why they did something, are they really able to find out what was their motivation?)

Elementary

@MartinSleziak Finally, I've learned why the brackets have disappeared.

@MartinSleziak I'm just surprised you were so helpful. Yes I think the problem is solved. Thank you very much!

Martin Sleziak

2:36 PM

In case it is helpful for you, I'll mention that & can be used in the cases environment - I have added an example in the linked document.

Elementary

@MartinSleziak Yes I have read.

Martin Sleziak

8:55 PM

The question "Can MathJaX support the picture environment?" was deleted by the OP a few hours after it was posted. To some extent, it might be considered a duplicate of: Are picture environments not allowed in MathJax? (Although the older post wasn't tagged feature-request.)

Elementary

11:55 PM

@MartinSleziak Can I have your 20 seconds if you'il excuse me?..

Transcript for

$Mathematics$ MathJax