in the postscript files produced by FRIDA, there is a macro to insert special characters:
1 2 3 4 5 6 7 8 | /grec { showif /Symbol findfont fontsize scalefont setfont } def /endgr { showif regularfont setfont } def |
so for example a small omega is produced by {() grec (w) endgr ()}.
it can be used to print special characters, using this map
take value of column times ten (that’s what the x means) and add the number of the column. example: degree sign: 26*10+0=260.
then use: {() grec (\260) endgr ()}