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The PUSH and POP commands
Occasionally it is desirable to transfer results from the normal
HOME
view to
the CAS screen or vice versa. This is done using the
PUSH
and
POP
commands.
Suppose we have just expanded (2x+3)
4
in the CAS, as shown right. If we press
ON
to exit the CAS and then type
POP
in the
HOME
view then the result will be retrieved
to the
HOME
screen as shown.
In this case we might wish to also paste the
result into the Function aplet. This can be done by
using
to retrieve the expression, enclosing it
in single quotes from the
CHARS
view and then
storing it ( ) into
F1(X)
or whichever is desired.
The reverse process is also possible
using
PUSH
but it is more limited in that
you must use the symbolic variable
S1
.
When you then press
you will
find that seemingly there has been no
result. However, pressing
HOME
you
will find that the expression has been added to
the tail of the CAS History and can now be
’d to the editing screen for use.