User Guide

About RPN

Read about Reverse Polish notation on Wikipedia.org.

Basic Operation

Use of the the left and right soft keys

Starting YaRPNcalc always shows you the Main screen which lets you enter numbers as well as make basic calculations.

The 'left soft key' usually toggles between the Menu screen and the Constants screen. When either the Menu screen or the Constants screen is active, the 'right soft key' will bring you back to the Main screen.

The 'right soft key' usually toggles between the Function screen and the Convert screen. When either the Function screen or the Convert screen is active, the 'left soft key' will bring you back to the Main screen.

Option buttons

Buttons drawn with a thick frame indicate that an option is enabled, e.g.

A thick frame can also indicate that a temporary mode is active, e.g. in Conversion Mode

Pressing a unit button will change the reference to that unit, but will not convert the value on the stack. The change reference mode will automatically be disabled after the reference has been changed.

A thick frame also indicates which one of a set of possible options is selected, e.g.

Menu

	Saves the stack for the next session when the YaRPNcalc is closed via Exit or Close.
	Shows a thousands separator when in Decimal mode. Shows a group (of 4) separator when in Hexadecimal or Octal mode. Shows a group (of 8) separator when in Binary mode.
	Changes the date format. Can be: d.my (dd.mmyyyy), e.g. 26.052007 m.dy (mm.ddyyyy), e.g. 5.262007 y.md (yyyy.mmdd), e.g. 2007.0526
	Swaps the two topmost elements on the stack.
	Clears the stack.
	Undos the last stack operation.

Functions

Category A

sine	arc sine	A^B	B th root of A
cosine	arc cosine	natural logarithm	e^x
tangent	arc tangent	B% of A	reciprocal value
pi	convert polar to rectangular coordinates x = B * cos(A) => B y = B * sin(A) => A	absolute value	last conversion used

Category B

hyperbolic sine	hyperbolic arc sine	x^2	square root
hyperbolic cosine	hyperbolic arc cosine	logarithm	10^x
hyperbolic tangent	hyperbolic arc tangent	percentage change ((B - A) / A) * 100	reciprocal value
pi	convert rectangular to polar coordinates r = sqrt(A^2 + B^2) => B phi = atan(A / B) => A	absolute value	last constant used

Category C

combination A! / B! * (A - B)!	permutation A! / (A - B)!	factorial max. x = 170
sum / number of elements on the stack	median	variance	sum of all elements on the stack
convert from decimal to HMS	convert from HMS to decimal	add HMS	subtract HMS
push current time on the stack	push current date on the stack	add B days to date A	number of days between dates A and B

Entering date and time

Enter time as: hh.mmss, e.g. 3.07127 would be 3 hours (or degrees), 7 minutes, 12.7 seconds

Dates have to be entered according to the date format selected on the Menu.

User Constants / Memory Locations

To save a value on the stack for later use it can be stored as a user constant. If you don't rename the constant there's no need to use the stylus. From the Main screen:

Press the Menu button (left soft key) Press the Constants button (left soft key) Make sure is selected Press the button Press a constant button Optionally rename it Press the button Press the Ok button (right soft key)

User Function Layouts

You can define your own function layouts. To do this, create a file called UserFunctionLayouts.txt in the YaRPNcalc program directory (\Program Files\YaRPNCalc\). It's built up like this:

	[Name]
	(Main)
	Function1
	Function2
	(Tab1)
	Function3
	Function4
	(Tab2)
	Function5

• [Name] defines the new function layout. Name can be any name you like. If a function layout with that name already exists, it will be replaced by this one.
• (Main) defines the four functions on the Main screen. If these are missing, the defaults (/,*,-,+) are used
• (Tab1) defines a functions tab (there can be three). Tab1 can be any name you like.
• Function are the functions to be assigned to the respective buttons. They are assigned from left to right and top to bottom. If you want to leave a button empty, assign a non-existing function (I use #empty#).

The default function layouts are defined in the file FunctionLayouts.txt which has exactly the same format. Please use this as an example as well as to look up the correct function names. Note that the function names are currently case sensitive.

	[All]
	(A)
	sin
	asin
	ypowerx
	root
	cos
	acos
	ln
	exp
	tan
	atan
	percent
	onedivx
	constpi
	polartorect
	abs
	quickconv
	(B)
	sinh
	asinh
	square
	squareroot
	cosh
	acosh
	log
	tenpowerx
	tanh
	atanh
	deltapercent
	twopowerx
	constpi
	recttopolar
	abs
	quickconst
	(C)
	comb
	perm
	factorial
	#empty#
	mean
	median
	sum
	#empty#
	convertToHMS
	convertFromHMS
	addHMS
	subtractHMS
	currentTime
	currentDate
	addDays
	deltaDays
	
	[RLH]
	(A)
	sin
	asin
	ypowerx
	root
	cos
	acos
	square
	squareroot
	tan
	atan
	log
	tenpowerx
	constpi
	onedivx
	ln
	exp
	(B)
	comb
	perm
	factorial
	#empty#
	mean
	median
	sum
	#empty#
	percent
	deltapercent
	#empty#
	#empty#
	recttopolar
	polartorect
	quickconst
	quickconv
	
	[HMS]
	(Main)
	convertToHMS
	convertFromHMS
	subtractHMS
	addHMS
	(A)
	sin
	asin
	ypowerx
	root
	cos
	acos
	ln
	exp
	tan
	atan
	percent
	onedivx
	constpi
	polartorect
	abs
	quickconv
	(B)
	sinh
	asinh
	square
	squareroot
	cosh
	acosh
	log
	tenpowerx
	tanh
	atanh
	deltapercent
	twopowerx
	constpi
	recttopolar
	abs
	quickconst
	(C)
	comb
	perm
	factorial
	divide
	mean
	median
	sum
	multiply
	currentTime
	currentDate
	#empty#
	subtract
	addDays
	deltaDays
	#empty#
	add

Don't change the FunctionLayouts.txt file, it will be replaced when installing a new version of YaRPNcalc. If you want to change a default function layout, just give one of your user function layouts (in UserFunctionLayouts.txt) the same name as the default function layout you want to replace.

Currency Converter

YaRPNcalc has a built in currency converter with support for over 30 currencies which are updated by The European Central Bank on a daily basis. To access the currency converter open the Conversion screen (press Function and then Convert) and activate the User mode. Then select Curncy to change to the currencies category.

To change the available currencies press Edit followed by the respective conversion button you want to change. Then edit its Label to one from this list (make sure to type all upper case).

To update the currency rates keep the Curncy button pressed for about one second. If you have Curncy set to On on the Menu screen, YaRPNcalc will update the currency rates on start up automatically.

YaRPNcalcHD

YaRPNcalcHD is a special version of YaRPNcalc optimised for 800x480 screen resolution (e.g. HTC Touch HD and Sony Ericsson XPERIA X1). This version supports a second screen layout in landscape mode which lets you directly change between DEC, HEX, OCT and BIN, gives you access to the most important stack manipulation functions as well as a choice of up to 8 functions which you can directly access from the main screen (additionally to +, -, *, /).

To change from portrait to landscape mode, either touch the stack or install an application like Gyrator 2 which changes the screen orientation automatically according to how you hold your device.

The 8 dedicated function buttons are user definable as described above under User Function Layouts. The easiest way to do it is to:

1. Start File-Explorer
2. Navigate to My Device/Programs/YaRPNcalc
3. Make a copy of FunctionLayoutsLandscape.txt and rename it to UserFunctionLayoutsLandscape.txt

4. Tap UserFunctionLayoutsLandscape.txt to open it in the default text editor
5. Edit the functions in the section (MainExt)
6. Close the text editor
7. (Re)start YaRPNcalc