Varying Font Size Within individual words

I need to produce the symbol "FA/FI" on the y-axis label with the "A" and the "I" in a font 3 sizes smaller than each "F". I do not want to use subscripts. In Microsoft Word, one achieves this by clicking on an icon on the toolbox. How does one do it in Matlab?

[Ben Korman]

After a bit of fiddling, this technique worked well.

Thanks dpb!

[dpb]

No problem...as noted, such a similar question so soon had me thinking along those lines already.

If solved the problem, why not "Accept" the Answer to indicate a solution found?

Wouldn't hurt to post the actual function/technique you found useful in the end as well.

[Ben Korman]

The code I finally used is as follows. It allows the symbol in question to be added to a general description on the y-axis label:

fmt   = '\\fontsize{%d} %s'; %format string for piece
fnLbl = @(FS,S) {[sprintf(fmt,FS,S(1)) sprintf(fmt,FS,S(2)) sprintf(FS-3,S(3)) sprintf(fmt,FS,'/') sprintf(fmt,FS,S(4)) sprintf(fmt,FS-3,S(5)) sprintf(fmt,FS,S(6))]};
lbl   = fnLbl(12,'(FAFI)');  % Specifies fontsize and string to be processed
str   = ['Fraction of Inspired Concentration', lbl];
newstr= join(str);
ylabel(newstr)

This produces a label on the y-axis consisting of a description "Fraction of Inspired Concentration" followed by a space, followed by the appropriate symbol.

Answer 1

[dpb]

Amazing how the same or similar queries seem to come in bunches...

<Answers/515556-how-do-i-change-the-appearance-of-a-tick-label>

hAx=gca;
hAx.XTickLabel(3)={'\color{red}\fontsize{8}\bf 3'};

did one tick value for the OP there. Just string together the two pieces you need. Write a simple function to produce the desired string passed the text and sizes if doing it for more than just one or two specific cases.

fmt='\\fontsize{%d} %s';           % format string for piece

>> [sprintf(fmt,8,'F',5,'A') '/' sprintf(fmt,8,'F',5,'I')]
ans =
    '\fontsize{8} F\fontsize{5} A/\fontsize{8} F\fontsize{5} I'
>> 

or, more directly to use passed string, size--

fnLbl=@(FS,S) {[sprintf(fmt,FS,S(1)) sprintf(fmt,FS-3,S(2)) sprintf(fmt,FS,'/') sprintf(fmt,FS,S(3)) sprintf(fmt,FS-3,S(4))]};

>> lbl=fnLbl(8,'FAFI')
lbl =
  1×1 cell array
    {'\fontsize{8} F\fontsize{5} A\fontsize{8} /\fontsize{8} F\fontsize{5} I'}
>> hAx.XTickLabel(4)=lbl;

produced the desired string. More logic in a function could make it somewhat simpler.

But, MATLAB handle graphics aren't a word processor and there's no fancy GUI to mung on stuff inside the tick labels array. Guess one could write one.

NB: Above w/ default 'TeX' interpreter as per the link...