HP HP-28S - Page 62

Check the current path.
PATH
3:
2: 'R1 +INV<INV(R2)+INV ...
1: { HOME }
ImDlIml!ImDlIlIllIICMmImEI
The list that PATH returns always begins with HOME and ends with
the current directory. HOME is the starting point for all paths and,
since you haven't created any other directories yet, HOME is also the
current directory.
To group together all your electrical engineering problems, create a
subdirectory named EE.
CJ EE CRDIR
Switch to the EE directory.
EE I ENTER I
Check the current path again.
PATH
3:
2: 'R1+INV<INV(R2)+INV ...
1: { HOME }
ImDlIml!ImDlIlIllIICMmImEI
3:
2: 'R1+INV( INV(R2)+INV ...
1: { HOME }
ImDlIml!ImDlIlIllIICMmImEI
3: 'R1+INV<INV<R2)+INV ...
2: { HOME }
1: { HOME EE }
ImDlIml!ImDlIlIllIICMmImEI
Now the current directory is EE. To see one effect of switching to the
EE directory, display the USER menu.
I USER I r:;;~:-:-; --;-, ;::OR 7""1 +~I;-;-N-;;-V-;-:(:-;I:-;-N~V~(-::::~::::2 H-::->;-:-jR;-;-~-;;-V"""'.}
1: { HOME EE }
------
Note that the RENAME program (created in the last chapter) doesn't
appear. Only variables in the current directory (EE) appear in the USER
menu; RENAME is in the HOME directory.
However, you
could still execute RENAME by typing its name, be-
cause any variable whose directory is on the current path (HOME EE)
can be found by name.
4: Repeating Calculations 61