Re: Hp49G and RPN syntax


scottblakely@xxxxxxxxx wrote:
> So okay, I am now more confused:
>
> If I enter the following:
>
> 2.54 [right-shift] [units] [cm]
> then
> [left-shift] [inches]
>
> I get the expected conversion of 1 inch
>
> If I enter:
> 1000000 [right-shift] [units] [microns]
> then
> [left-shift] [ft]
> I get 1.0000E6_({microns}*ft)
>
> but
> 1 [right-shift] [units] [meter]
> then
> [left-shift] [ft]
> results in 3.2808E0_ft.
>
> and
> 1000 [right-shift] [units] [mm]
> then
> [left-shift] [ft]
> resuts in 3.2808E0_ft.
>
> So why is the 49G stumbing over converting 1000000 microns to feet when
> it can handle the 1 meter and 1000 mm conversions to ft just fine?
>
> So I have a flag set wrong?

Scott: better than trying to learn a procedure you have to understand
the philosophy using soft menus.
The question is that you have three ways for using a soft menu key:

Directly: always enabled, this way you have the first use of the menu.
So if you type f.e: 2 [enter] m you have 2_m in level 1.

Right shifted: is the second use of a soft menu (if it has it). In the
exemple above, with 1_m in level 1 if yo press right shift and after ft
(remember you don't have to type another number key), yo will have
6.561..._ft in level 1.

Left shifted: is the third use of a soft menu. In this case the use is
for use the mentioned unit as a divisor exemple:
If you have 1 _m in level 1 of the stack and you press left shift and
then s (second, in the unit menu time) you will find in level 1 1_m/s.
This ability is for making your own unit and is very useful.

Remember: you have to understand how you can use a soft menu. This way
is how soft menus work and why are so useful and powerful

.