matlab: putting a circled number onto a graph

Question

I want to put a circled number on a graph as a marker near (but not on) a point. Sounds easy, but I also want to be invariant of zoom/aspect ratio changes. Because of this invariant, I can't draw a circle as a line object (without redrawing it upon rescale); if I use a circle marker, I'd have to adjust its offset upon rescale. The simplest approach I can think of is to use the Unicode or Wingdings characters ① ② ③ etc. in a string for the `text()` function. But unicode doesn't seem to work right, and the following sample only works with ① and not for the other numbers (which yield rectangle boxes): works: ``` clf; text(0.5,0.5,char(129),'FontName','WingDings') ``` doesn't work (should be a circled 2): ``` clf; text(0.5,0.5,char(130),'FontName','WingDings') ``` What gives, and can anyone suggest a workaround?

Accepted Answer

This seems to work for me, uses Matlab's latex interpreter, and `	extcircled`:

```
clf; text(0.5, 0.5, '$	extcircled{2}$', 'Interpreter', 'latex')
```

The `	extcircled` command seems have some offset problems, maybe you can try to improve the used latex command and let us know :)

Following the above link, for example, I get better results with:

```
clf; text(0.5, 0.5, '$aisebox{.5pt}{	extcircled{aisebox{-.9pt} {2}}}$', 'Interpreter', 'latex')
```

Still, two digit numbers look awful.

matlab: putting a circled number onto a graph

Solution

Problem