How to add tex to an octave graph

I have a bar chart and I am using text () to display the fractions above each of the columns. For example:

text(1, 20, "300/400")

      

        
        
        
      

    

displays the string "300/400" at position (1.20).

Now I would like to clear the fractions so that “300” appears above “400”:

300
---
400

      

        
        
        
      

    

Is there a way to do this with tex or latex for example?

I've tried each one, but the interpreter doesn't get it:

text(1, 20, '\frac{300}{400}');
text(1, 20, '\frac{300}{400}', 'interpreter', 'tex');
text(1, 20, '\frac{300}{400}', 'interpreter', 'latex');