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+--- Thread: (12C) Geometric & Harmonic Mean (/thread-21950.html)
(12C) Geometric & Harmonic Mean - Gamo - 06-26-2024 04:51 AM
Program to calculate the Geometric and Hamonic Mean
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Procedure:
For every new problem first " Clear Statistic Registers "
To clear statistic register press [f] [Σ]
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Enter each Data Value press [R/S] and display will show
the number of data entered 1, 2, 3, ....... , n
When done press 0 [R/S] display answer for Geometric Mean
[X<>Y] display answer for Harmonic Mean
---------------------------------------------------------------
Example:
Data: 30, 10
[f] [Σ]
30 [R/S] display 1
10 [R/S] display 2
0 [R/S] display answer for GM = 17.3205 [X<>Y] for HM = 15
----------------------------------------------------------------
Program:
Quote:01 X=0
02 GTO 09
03 1/x
04 ENTER
05 LSTx
06 LN
07 Σ+
08 GTO 00
09 X-bar // [g] [0]
10 X<>Y
11 1/x
12 X<>Y
13 e^x
Gamo 6/2024
RE: (12C) Geometric & Harmonic Mean - PedroLeiva - 06-26-2024 03:08 PM
I am trying to load this program in my HP-25, and have difficulty understanding step number 9: x-bar//[g] [0]. Can you assist me please. Pedro
RE: (12C) Geometric & Harmonic Mean - bxparks - 06-26-2024 04:50 PM
(06-26-2024 03:08 PM)PedroLeiva Wrote: I am trying to load this program in my HP-25, and have difficulty understanding step number 9: x-bar//[g] [0]. Can you assist me please. Pedro
"x-bar" is the "mean of x", located at [g] [0] on the HP-12C. It calculates both the mean of X and the mean of Y.
On the HP-25, it looks like x-bar is located at [f] [x<>y] according to the images that I see on the internet. No idea if it calculates both x-bar and y-bar like the HP-12C.
RE: (12C) Geometric & Harmonic Mean - PedroLeiva - 06-26-2024 05:48 PM
(06-26-2024 04:50 PM)bxparks Wrote:TYVM, I will test and inform. Pedro(06-26-2024 03:08 PM)PedroLeiva Wrote: I am trying to load this program in my HP-25, and have difficulty understanding step number 9: x-bar//[g] [0]. Can you assist me please. Pedro
"x-bar" is the "mean of x", located at [g] [0] on the HP-12C. It calculates both the mean of X and the mean of Y.
On the HP-25, it looks like x-bar is located at [f] [x<>y] according to the images that I see on the internet. No idea if it calculates both x-bar and y-bar like the HP-12C.
RE: (12C) Geometric & Harmonic Mean - Gamo - 06-27-2024 09:58 AM
I'm looking in the HP25 User's Handbook on page 68
About using the (Mean) function the X-bar key.
Example provided only the Mean Value on the X-Stack and look like
no Mean Calculation on the Y-Stack unlike the HP-12C example on page 89
Remark:
This program on line 10 the [X<>Y] key swap the Y-Stack for the Mean Value
from the Y-Stack to calculate the Harmonic Mean
Gamo
RE: (12C) Geometric & Harmonic Mean - PedroLeiva - 06-27-2024 10:02 AM
Yes Gamo, you are right. For double mean (X & Y) stack values I will have to use HP-67. Thanks for taking care of the issue. Pedro
RE: (12C) Geometric & Harmonic Mean - bxparks - 06-27-2024 02:25 PM
(06-27-2024 10:02 AM)PedroLeiva Wrote: Yes Gamo, you are right. For double mean (X & Y) stack values I will have to use HP-67. Thanks for taking care of the issue. Pedro
The same HP-25 manual also says that Σy is collected in R4, and N is collected in R3. And ybar=Σy/N. It shouldn't be hard to adapt the program to the HP-25 by calculating ybar manually using R4 and R3.
RE: (12C) Geometric & Harmonic Mean - PedroLeiva - 06-27-2024 09:40 PM
I have an HP-25C version of Geometric and Harmonic Mean, but 8MB load cuota is exceeded. If anyone is interested, please send me an email to: pedrodanielleiva@gmail.com. As far as I know with private messages is not possible to attach files. Pedro
RE: (12C) Geometric & Harmonic Mean - SlideRule - 06-27-2024 11:40 PM
(06-27-2024 09:40 PM)PedroLeiva Wrote: I have an HP-25C version of Geometric and Harmonic Mean, but … Pedro
as received from same
[attachment=13667]
BEST!
SlideRule
RE: (12C) Geometric & Harmonic Mean - PedroLeiva - 06-27-2024 11:59 PM
Thank you SlideRule
Pedro
RE: (12C) Geometric & Harmonic Mean - Gamo - 06-29-2024 04:10 AM
Program update from Post #1 to include the Arithmetic mean
Usage:
Data: 40, 10
[f] REG
[f] Σ
40 [R/S] display 1
10 [R/S] display 2
0 [R/S] display answer for AM is 25
[R↓] display answer for GM is 20
[R↓] display answer for HM is 16
Remark: AM > GM > HM
-----------------------------------------
Program:
Quote:01 X=0
02 GTO 10
03 STO+0
04 1/x
05 ENTER
06 LSTx
07 LN
08 Σ+
09 GTO 00
10 X-bar
11 X<>Y
12 1/x
13 X<>Y
14 e^x
15 RCL 0
16 RCL 1
17 ÷
Gamo