I think what you are asking is how to make the axis lables show the a,b,c etc.
unfotunately the best way is to select each axis, goto patterns and select
None for tick mark lables. then use text boxes to put each lable whaer you
want it.
I do not know of a way to make a numeric axis as in xy or bubble charts
display text directly.

"Federico" wrote:

Hello,

How could I do a bubble chart this way:
a b 23
a c 34
a d 12
b a 12
b c 111
b d 15
etc, etc... Instead of:
1 2 23
1 3 34
1 4 12
2 1 12
etc, etc
??

Thanks in advance,
Federico