? RPL/HP-48 - numerical S on a << >> integrand ?

[OlidaBel]

(08-05-2021 01:27 PM)Joe Horn Wrote:  Try writing the program as a "user-defined function" which means storing the argument(s) in local variable(s) like this:

<< -> X << X SIN X SQ - >> >>
or
<< -> X 'SIN(X)-X^2' >>

RPL treats programs like that more like built-in functions when solving, graphing, and so on, so it might help here too.

Unfortunately something like this is refused on HP 48GX :
0
1
<< -> X 'SIN(X)-X^2' >> or << -> X << X SIN X SQ - >> >>
'X'
S
=>
"S Error:
Bad argument type"

I checked the old HP-28s documentation. This calculator was more permissive with S.