HP41CV

The intelligent UPN-pocket calculator for phone and tablet.

Most of the original HP41CV functionality is free

A short UPN lesson and the list of functions can be found in the build in help

For a detailed description see the Handbook of the origial HP-41C wich can be found here Manual

You can expanded this powerfull calculator by the following options

statistic, persistence, programming, robust statistic

Statistic

This option enables the statistic funtionality of the original HP 41C.

For the statistic function the HP41CV uses a block of six Register (R11 - R16 by default)

STAT + 0

Q_x = ∑x

STAT + 1

Q_xx = ∑x²

STAT + 2

Q_y = ∑y

STAT + 3

Q_yy = ∑y²

STAT + 4

Q_xy = ∑x*y

STAT + 5

n_x

The following build in function are available

∑+

add the x and y value to the summs

∑-

removes the x and y value from the summs

CL∑

reset the summs

∑REG

specify the position of the statistic block

MEAN

calculates the mean of the x and y series

SDEV

calculates the standard deviation of the x and y series

Robust Statistic

This option adds more power to the basic statistic funtionality.

Additional statistic register are computed

STAT + 6

n_y

STAT + 7

s_x² = ∑(x - x)²/(n_x - 1)

STAT + 8

s_y² = ∑(y - y)²/(n_y - 1)

STAT + 9

s_xy² = ∑(x - x)*(y - y)/(n_x - 1)

STAT + 10

d = ∑(x - y)

STAT + 11

s_d² = ∑(d - d)²/(n - 1)

STAT + 12

Working register

STAT + 13

Working register

Instead of two data series of the same lengs now up to 99 series with individual lengs can be used.
The following aditional build in function are available

MEDIAN

median of the x serie

MAD

middel absolute distance of the x serie

∑+N

add the x value to a selected serie

∑X↔

exchange the x serie with a selected serie

∑Y↔

exchange the y serie with a selected serie

GET∑X

copy a element from the x serie the x register

GET∑Y

copy a element from the y serie the x register

DEL∑

remove a element for x and y serie

CL∑∑

reset the summs and all data series

COUNT

number of not empty series

COUNTN

number of values in a serie

MEANN

calculates the mean of a serie

SDEVN

calculates the standard deviation of a serie

integral limit of t-distribution single side p and f are taken from the specified and the following register

integral limit of t-distribution single double p and f are taken from the specified and the following register

f-distribution p is taken from register STAT + 13 f1 and f2 from STAT + 5 and STAT + 6

REG

linear regression of the x and y serie

IREG

invers linear regression of the x and y serie

PREG

print the result of normal and invers linear regression (requires print option)

In addition to the extention function a set of buld in programs offers more complex funtcion
This programs can be used without programming option but with this option you can use the as startingpoint for you own adaptations.

TTEST

one sample T²-test, compares the x serie with the x register

TTEST2

two sample T²-test, compares the x serie and the y serie

TTEST2P

two paired sample T²-test, compares the x serie and the y serie

FTEST

F-test, compares the variance of the x serie and the y serie

SDEVP

calculates the standard deviation of parallel serie

CI95P

confidence intervall of parallel serie

GRUPPS

remove outlier from the x serie

Programming

Programs can be loaded from text files with the extension 41p.
Build in function, loops and branches can be used.
Not supported is the edit functionality.

A simple program for calculating the area of a circle looks as follows

Program=CIRCLE
X↑2
PI
*
EndProgram

Use the symbol table to enter letters like ↑,↓ or ᵀ

See this example for a program with text,lable and loop

Program=GOTHAM
ᵀYEARS?
PROMPT
STO 00
1624
STO 01
24
STO 02
LBL 01
RCL 02
6
%
ST+ 02
1
ST+ 01
DSE 00
GTO 01
RCL 01
FIX 0
PSE
FIX 2
RCL 02
EndProgram