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30

Try to keep as much of your answer in text as possible; obviously, some diagrams cannot be replicated on the site and need to be posted as images and it is certainly appropriate to do so. However, these diagrams should be split off from the rest of the text so that as much as possible remains in plain text. There's a number of reasons to do this, but the ...

22

It can be done in MathJax, but it is painful and a complete hack. Here is one way: \require{enclose} \def\uline#1#2{\enclose{updiagonalstrike}{\phantom{\Rule{#1em}{#2em}{0em}}}} \def\dline#1#2{\enclose{downdiagonalstrike}{\phantom{\Rule{#1em}{#2em}{0em}}}} % \def\place#1#2#3{\smash{\rlap{\hskip{#1em}\raise{#2em}{#3}}}} % \hskip 1em % \place{0}{12}{\bullet} ...

21

In your special case we can get away with the built-in \triangledown to represent the lines connecting each vertex. We can also make use of \odot to represent each ringed node: \begin{array}{ccc}\hline\text{Case}&\text{Coxeter diagram}&\text{Vertex configuration}\\\hline\text{1 ringed node}&{}^{\boldsymbol p}\hspace{-0.15cm}{\Huge\triangledown}...

21

There is a fairly workable solution right now using html, though I agree that a more intuitive method would be preferable. First, you have to upload the image as normal, and get the imgur link, for example. https://i.stack.imgur.com/m2uYu.png If you click on that, you'll see it's way too large. You can then include the image in your post scaled to any factor ...

19

It is sort of possible via the MathJAX extension HTML using commands of the form style{css}{math}. Basically, this style command will attach some extra CSS style attributes to the math elements and let the browser render them. However, how are they rendered depend on browser and even for a single browser, it takes a lot tweaking to make it looks right (...

18

My thought process: If it's TeX-ifiable, do so. If it's too long to texify and it's recent, link the OP to the LaTeX guide. If it's too long to texify and it's old, too bad. If it's too long to texify because it's simply a lazy "dumping" of a question onto SE, then vote to close.

18

I am the "commenter" that you're referring to in the last sentence. Before explaining anything, I would like to draw your attention to the benefits of having things properly typed. More efficient (math) searching We can easily find a bunch of questions with math expressions like "$n < 2^n$" with the help of Approach0. Figure 1: Logo of the math search ...

17

Yes. The advantages of replacing images with MathJax and MarkDown are: It provides searchable text; It is more compatible with accessibility features; It is easier to read; It provides MSE with a more uniform look-and-feel; It does not depend on servers and services beyond StackExchange's control. That said, please improve the post in every other aspect ...

15

Some decide instead of typing the actual text of the question, typesetting formulae with LATEX and using plotting software, it would be better for them to avoid the effort Okay, hold on. You seem to be under the impression that computer typesetting and plotting is easy. Something anyone who uses this site should have in their skillset. Do you really expect ...

15

Our standard procedure when we get any request for a special site plugin like this is to ask for two things: community support on meta evidence that it would make a significant improvement to post and/or community quality In other words, we'd like for you to edit this meta question to show us examples of several posts on the site that would benefit ...

15

Let us create here a community wiki answer to collect resources on this topic elsewhere on the web. Related posts on TeX Stack Exchange: What is the status of generating LaTeX from handwriting (i.e., OCR)? (August 2010) How to convert PDF to (La)TeX? (January 2011) Image equation to TeX (May 2013) Possible to Convert Math in Picture into LaTeX? How? (...

14

If you know Mathematica syntax you can use Wolfram Alpha for simple graphs. Then post the image here:

14

I think TikZ rendering would be a great asset to the site. Well-made pictures can be an enormous aid in learning, from diagrams for path integrals in complex analysis to this image illustrating the proof of the Cantor–Schröder–Bernstein Theorem in set theory. Commutative diagrams in particular are essential in areas such as algebra, algebraic geometry, ...

13

We prefer you do not ask a question using a photo of text. Instead, please transcribe it using MathJax. There are several reasons for this. Without text, the question is unsearchable, and it is unlikely another user with the same question will find it. The core principle of StackExchange is to provide help in a way that can also benefit spectators and ...

12

In this answer I posted the following plot created in $\mathrm{\LaTeX}$, using the TikZ package. Or a contour such as this one

12

People should be encouraged to avoid putting the main content of their question in an image. This makes the question harder to find using search and inaccessible to the visually impaired, which is less than ideal. Making something harder to find via search is especially unfortunate, as it means that others who might be interested in the same question won't ...

11

You can scale down images by appending l m or s to the filename, before .extension. After upload, the image below was named http://i.stack.imgur.com/2pBS0.png Here's the l version with URL http://i.stack.imgur.com/2pBS0l.png; the images scaled with l should not be wider than the allocated horizontal space for the display of question and answers. And ...

11

I'm the wrong person to tell the whole story, but I know that you can resize images by using an appropriate HTML img attribute. Below I reuse an animation that is a small part of an answer of mine from main. First 200 pixels wide <img src="http://i.stack.imgur.com/dIISR.gif" width="200"> Then resized <img src="http://i.stack.imgur.com/dIISR.gif" ...

10

Just add hover text in parentheses: [1]: http://i.stack.imgur.com/..... (hover text) or in quotation marks: [1]: http://i.stack.imgur.com/..... "hover text" Like this: Works for links, too. There's a good reason to have alt-text and hover-text as separate attributes: one is intended for users who don't see the image, the other for those who do.

10

We have a special close reason for questions consisting only of a copy of an exercise from a textbook: This question is missing context or other details: Please improve the question by providing additional context, which ideally includes your thoughts on the problem and any attempts you have made to solve it. This information helps others identify where ...

10

A quick Google search produced this handy run-down of the GIF file format, which includes this section on looping: Example (not in sample file): 21 FF 0B 4E 45 54 53 43 41 50 45 32 2E 30 03 01 05 00 00 The GIF89 specification allows for application-specific information to be embedded in the GIF file itself. This capability is not much used. About the ...

10

We already had users posting pornographic pictures, or stuff like that. I think that's a good enough reason. At the very least require someone to add something of possible value to the site before adding something very terrible.

9

The answer to the question in the title is that It can't be done. MathJax interacts poorly with MarkDown (they overwrite each other's pieces). The way around it is to escape everything inside a MathJax environment and hide it from view of MarkDown. Therefore by design loading of pictures/links using MarkDown syntax inside a MathJax environment will not work....

9

The most you can do is provide a link to the image. Comments are not meant to take up a lot of space, and one thing that pictures tend to do is take up space. However, it's common enough that comments may contain the need to reference images in order to help clarify or expand on the point they are making. So simply linking to the images is perfectly fine. ...

8

Well, there are many ways to create a picture, and upload it here. Some of the more obvious alternatives are: (1) MS Paint, GIMP, or other paint programs (2) Illustrator, Corel, Powerpoint, Inkscape, or other vector drawing packages (3) TikZ or MetaPost or Asymptote, if you think that writing code is a good way to create pictures. (4) Mathematica, Maple, ...

8

If You Really Must... The way I center an image is to put an appropriately sized \hspace{} before the image. In this answer, you can see Here is a plot of $\displaystyle\frac1{\sqrt{n}}+\frac{(-1)^n}n$ showing the non-monotonicity: $\hspace{3cm}$![enter image description here](http://i.stack.imgur.com/d5eu5.png) which shows up as Here is a plot of $\... 7 When composing your post, click the image button, bordered in red below.$\hspace{3.5cm}$That should bring up the "Add Image" dialog:$\hspace{2.5cm}\$ In the "Add Image" dialog, click the "Browse..." button and select the image file to upload. Then click the "Add picture" button. Your image should appear in your post.

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