MathU™ RPN 2.2 for iPhone
Documentation
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Preferences
The preference screen is displayed when you execute the PREFS function. It can also be accessed by the (i) icon on the keypad.
- Digits: Number of digits or All if you want all the significant digits to displayed. The number of digits displayed depends on the format. In scientific and fixed format, it is the number of digits after the decimal. In engineering format one more than the number chosen decimal digits are displayed.
- Format: MathU RPN can display results in either fixed, scientific, or engineering format.
- Fixed format displays results with a fixed number of decimal digits but will over- or underflow to scientific notation showing all digits if the value is too big or too small.
- Scientific format displays all results in scientific notation with a fixed number of decimal digits. Numbers in scientific notation are displayed as
which is interpreted as the number 1.234567890 x 1099. - Engineering format is just like scientific format except that the exponent is always a multiple of three.
- Number base: Display number using decimal, hexadecimal, octal or binary format. Also choose whether to display non-decimal numbers with leading zeros.
- Angles: Angle domain for trigonometric functions. The state of this preference is also indicated in the display.
- Payments due: Financial annuity mode. Payments can be due at the beginning of the pay period (annuity due) or at the end of the period (ordinary annuity). The state of this preference is also indicated in the display.
- Wordsize: Number of bits to use for integer base functions like Hex, Oct, and Bin. Values larger than this number of bits will continue to be displayed. Execute an integer base function to truncate such integers to bring them into range. Values between 1 and 48 are supported.
- About: Display version and copyright info for MathU RPN.
- Stack height: Number of registers in the stack. Select this to switch between 4 and 16 registers in the stack. You may want to change this setting to 4 when you want to perform repeated calculations using a single value. See Repeated Calculations for more info.
- Date format: Entry format for dates. Either M.DY or D.MY. When in M.DY format, date values are interpreted as MM.DDYYYY. While in D.MY mode, date values are interpreted as DD.MMYYYY. Four digit years are required.
- Button Clicks: Turns on or off button click sounds.
- Show more stack: Turn on to display both the x and y registers in the display. When off, only the x register is displayed.
Tap each setting line to go to screen that displays the choices. Tap the desired new setting to select it and return to the settings screen.