OmniCalc® User Manual

Getting Started

Equation Display

The equation display shows all of the operations you have entered since the last time Clear All () was pressed.

You can scroll up or down and make changes to any line. Any changes will be reflected instantly in the calculations.

If the line you want to change is not already highlighted, scroll to the desired line and select it by tapping it one time. Once the line has been selected you have the following options:

Change the value on the line by entering a new number
Change the operator on the line by entering a new operator
Change by the value and the operator
Clear the line and enter a new operation
Activate the In-Line Menu (see Advanced Topics)

Shift Functions

Shift Functions are printed above the keys. will swap the Function keys with their Shift Function counterparts. Press again to swap back to the original Function keys.

Date Math

Dates are recognized by use of the key. Date Operations can be performed on dates to calculate past dates, futures dates, elapsed days, etc. (see Controls for settings to include or exclude days from date math).

Results

OmniCalc® can display up to 16 digits plus a minus sign and a 2 digit exponent. Results with more than 16 digits will display in scientific notation.

Memory

OmniCalc® has a 100 by 100 memory matrix. The figure below shows the layout of OmniCalc®‘s 100 Memory Registers.

Each Memory Register has the capacity to hold 100 Data Elements. Advanced Statistical Operations explains more about accessing Data Tables. Additional operations that access Memory are described in Basic Memory Operations, Advanced Memory Operations and Basic Statistical Operations

Clear and Clear All

Clear

Clear the line at the current cursor location

Clear All

Erase all lines

Note:
Hold for 2 seconds to clear all operations, memory registers and statistical data tables.

Hold for 4 seconds to exit FORM mode and also clear all operations, memory registers and statistical data tables.

Equals

The operator will complete all pending operations and display the final results on a single line.

If the cursor is located above an , then pressing will move the cursor to the next line with an operator until reaching the last operator in the series of operations.

Parenthetical Expressions

Open Parenthesis

Close Parenthesis

Parenthetical expressions can be nested to a depth of 100 levels within and brackets.

Pressing after a bracket will close any remaining open parentheses before completing the operation.

Simple Operations

Addition: 1 1 2

Subtraction: 10 2 8

Multiplication: 5 6 30

Division: 35 7 5

Negation: 15 6 -9

Absolute value: -5 6 11

Reciprocal: 5 100 20

Fix to k: 5.12853 2 5.12

Round to k: 5.12853 2 5.13

Basic Memory Operations

Basic Memory Operations use Data Element [00] of Memory Register [00]

Add to Memory: 25

Subtract from Memory: 5

Recall from Memory: 20

Clear Memory

Advanced Memory Operations

Advanced Memory Operations use Data Element [00] from any of the referenced Memory Registers [00] through [99]

Put in Memory Register [##]: 45 [12]

Add to Memory Register [##]: 25 [12]

Subtract from Memory Register [##]: 5 [12]

Recall from Memory Register [##]: [12] 65

Notes: Clear Memory: Holding for 2 seconds will clear all operations, all memory registers and all statistical data tables.

Clear Form: Holding for 4 seconds will exit FORM mode, clear all operations, all memory registers and all statistical data tables.

Date Operations

Add Days: 1/1 12 01/13/2010; 5 12/16 12/21/2010

Subtract Days: 5/2 10 04/22/2010

Subtract Dates: 5/2 4/3 29

Percent Operations

Percentage (10% of 1000): 1000 10 100

Ratio (Ratio of 30 to 6): 30 6 500

Increase (Add 18% to $25.00): 25 18 29.50

Discount (Marked down 9% from $100.00): 100 9 91

Constants

The PI constant is calculated internally as 3.14159265358979323846264338327

Random Number

Generates a random value between 0 and 2³²

Today’s Date

Inserts the current date in the format MM/DD/YYYY

Beginning of the Month

Inserts the first day of the current month in the format MM/DD/YYYY

End of the Month

Inserts the last day of the current month in the format MM/DD/YYYY

Integer Summation

calculates the sum of a sequence of numbers from 1 to n

: 232 27028

Integer Factorial

calculates the product of a sequence of numbers from 1 to x

: 7 5040

Permutations

A permutation is an arrangement of objects in which order is important.

calculates the number of possible permutations of n items taken r at a time.

An example would be to calculate the number of possible outcomes for the first, second and third place positions of a horse race if there are 8 horses in the running.

Number of Permutations: 8 3 336

Combinations

A combination is an arrangement of objects in which order is not important.

calculates the number of possible combinations of n items taken r at a time.

An example would be to calculate how many different combinations of 5 cards each can be dealt from a deck of 52 cards.

Number of Combinations: 52 5 2598960

Exponentiation

Squared: 5 25

Square Root: 36 6

Power of Y: 9 3 729

Root of Y: 16 4 2

Logarithmic Functions

Logarithm: 100 2

10^x: 2 100

Natural Logarithm: 5 1.609437912434

Exponential Function: 1.609437912434 5

e constant is calculated as 2.7182818284590451

Trigonometric Functions

Trigonometric Functions will be based on angular units represented in Degrees, Radians or Gradians. You can change the angle units for all Trigonometric Functions in the OmniCalc® Controls. The default setting is Radians.

Sine: 0

Cosine: 1

Tangent: 1 1.557407724655

Inverse Trigonometric Functions

Inverse Trigonometric Functions will either have a direct access button as shown below or they will be accessed by pressing the button (see Controls for more about keyboard layouts).

The symbol INV will appear at the top of the Equation Display to indicate when Trigonometric Functions ( ) are in Inverse Mode (see Controls for settings to control sticky / keys).

Inverse Sine

Inverse Cosine

Inverse Tangent

Hyperbolic Functions

Hyperbolic Functions will either have a direct access button as shown below or they will be accessed by pressing the button (see Controls for more about keyboard layouts).

The symbol HYP will appear at the top of the Equation Display to indicate when Trigonometric Functions ( ) are in Hyperbolic Mode (see Controls for settings to control sticky / keys).

Hyperbolic Sine

Hyperbolic Cosine

Hyperbolic Tangent

Inverse Hyperbolic Functions

Inverse Hyperbolic Functions will either have a direct access button as shown below or they will be accessed by pressing the and buttons (see Controls for more about keyboard layouts).

The symbols HYP/INV will appear at the top of the Equation Display to indicate when Trigonometric Functions ( ) are in Inverse Hyperbolic Mode (see Controls for settings to control sticky / keys).

Inverse Hyperbolic Sine

Inverse Hyperbolic Cosine

Inverse Hyperbolic Tangent

Basic Statistical Operations

Basic Statistical Operations use Data Elements [00] through [99] from Memory Register [00]

Insert Data Element

15

Delete Data Element: 25

Number of Data Elements: 3

Average of Data Elements: 15.3333

Minimum Data Element: 12

Maximum Data Element: 19

Sum of Data Elements: 46

Sample Standard Deviation: 3.511884584284

Population Standard Deviation: 2.867441755681

Advanced Statistical Operations

Advanced Statistical Operations use Data Elements [00] through [99] from any of the referenced Memory Registers [00] through [99]

Insert Data Element to Register [##]

15 [12]

25 [12]

19 [12]

12 [12]

Delete Data Element From Register [##]: 25 [12]

Number of Data Elements in Register [##]: [12] 3

Average of Data Elements in Register [##]: [12] 15.3333

Minimum Data Element in Register [##]: [12] 12

Maximum Data Element in Register [##]: [12] 19

Sum of Data Elements in Register [##]: [12] 46

Sample Standard Deviation from Register [##]: [12] 3.511884584284

Population Standard Deviation from Register [##]: [12] 2.867441755681

Controls

The OmniCalc® controls is where you can change the style and certain behaviors of your calculator.

Advanced Topics

In-Line Menu

Slide your finger across any non-blank line in the equation display to activate the In-Line Menu.

The In-Line Menu gives you the following options:

INSERT – insert a new line into the equation

DELETE – delete the selected line

LABEL – label the selected line

CANCEL – clear the menu without making changes