Erable
has two major modes: complex and real mode. The user flag 13
is set in complex mode and cleared in real mode (default state). This mode
affects the way Erable
outputs results. For example, partial
fraction decomposition is made over
or over
depending of the current mode. If you
see unwanted i on the stack, this means that Erable
is probably
in complex mode. For G/GX users,
the key sequence -right shift-CST
provides an easy way to switch to complex or real mode using arrow keys
to select the mode (type the ENTER
key to confirm).
HP48S/SX users can go to real mode either by typing
13 CF
or by typing VER
(which reset all flags to their
default state) and can switch to complex mode by typing
13 SF
.