HP 12c Platinum Reference Manual page 89
Hp 12c platinum: reference guide
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Also See for 12c Platinum:
- User manual (288 pages) ,
- Owner's handbook manual (213 pages) ,
- Solutions handbook (166 pages)
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12c platinum / 12C
RPN KEYSTROKES
:0
z
:2
+
?6
g(000
fs
n: Unused
FV: Unused
R
: T
3
t-1
R
-R
: Unused
7
.4
Program Instructions:
Selecting the "best" smoothing constant (α ):
1.
Key in the program and press fCLEARH.
RPN Mode:
2.
Key in the number 1 and press \.
3.
Key in the "trial " and press ?0-?1.
ALG Mode:
2.
Key in the number 1 and press -.
3.
Key in the "trial " and press ?0³?1.
4.
Key in the first historical value (X
5.
Key in the second historical value (X
between the forecast value D ˆ
Press t ; the display shows the next forecast D ˆ
6.
7.
Optional: Press : 5 to display the smoothed estimate of current demand.
8.
Continue steps 5 and 6 for X
When doing step 5 merely key in the value and press t (do not press ? 6).
9.
Press : 4. This value represents the cumulative forecasting error (∑e
value and the following additional values; press : 0 (α), : 2 (smoothed average
), : 3 (trend T
S
t-1
10. Press f CLEAR H .
11. Repeat steps 2 through 10 until a "best" α is selected based on the lowest cumulative
forecasting error (Register 4).
DISPLAY
0 :6
038,
45
10 g(000
039,
2 fs
040,
45
041,
40
042,
44
6
043,43,33,000
REGISTERS
i: Unused
R
: α
0
2
R
: Σe
4
) and press ?2.
1
) and press ?6t. The result is the error
2
(
) and the true value (X
t+1
, X
, ... X
3
4
n
) and : 6 (forecast D ˆ
t-1
12c platinum
ALG KEYSTROKES
PV: Unused
R
: 1-α
1
R
: D
5
t
).
t+1
(
).
t+2
until all historical values have been entered.
).
t+1
Forecasting
DISPLAY
038,
45
039,43,33,000
PMT: Unused
R
: S
2
t-1
: D ˆ
R
t+1
6
2
). Record the
89
6
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