ME 142 Engineering Computation I Excel Functions

Questions on Homework or Class Prep?

Key Concepts Basic Math Operations Basic Math Functions Trigonometry Functions Logical Functions & Operators Date & Random Number Functions Finding Functions Selecting Ranges

Basic Math Operations

How do you perform basic math operations in Excel?

Basic Math Operations  Basic Math Operators +Addition -Subtraction /Division *Multiplication ^Exponent ( )Parenthesis, as need, follows algebraic precedence

Evaluate the following expression in a cell: Example Problems

Create a table of x,y values for the following equation, where x = 1,2,3..10 Example Problems

Basic Math Functions

What are some commonly used Excel functions?

Basic Math Functions SUM(range) -returns the summation of a range of number SQRT(x) -returns the square root of a number ABS(x) -returns the absolute value of a number MAX(range) - returns the largest number in a set of values MIN(range) -returns the smallest number in a set of values COUNT(range) -counts the number of cells in a range that contain numbers COUNTA(range) -counts the number of cells in a range that are not empty STDEV(range) -estimates the standard deviation based on a sample

For the list of numbers, find the sum, max and min Example Problems

Trigonometry Functions

In Excel, is the default angle measurement in radians or degrees?

Trigonometry Functions  Excel uses Radians by default in all trig functions  Use RADIANS and DEGREES functions to convert  RADIANS(x) -converts degrees to radians where x is given in degrees  DEGREES(x) -converts radians to degrees where x is given in radians

Trigonometry Functions  SIN(x)- returns the sine of an angle where x is in given in radians  COS(x)- returns the cosine of an angle where x is given in radians  TAN(x)- returns the tangent of an angle where x is given in radians  ASIN(x)- returns the arcsine of a number in radians, in the range –pi/2 to pi/2  ACOS(x)- returns the arccosine of a number in radians, in the range 0 to pi  ATAN(x)-returns the arctangent of a number in radians, in the range –pi/2 to pi/2

Trigonometry Functions  Functions may be nested: =cos(radians(45)) =degrees(asin(.5))

Find the hypotenuse and interior angles of the right triangle. Example Problems

Logical Functions & Operators

What are logical functions used for?

Logical Functions & Operators  IF(logical test, value if true, value if false) -checks if a condition is met, returns one value if True, another value if False  AND(logical1,logical2,…) -returns True if all arguments are true, otherwise returns False  OR(logical1,logical2,…) -returns True if any argument is true, returns False only if all arguments are False  NOT(logical) -returns True if argument is False, returns False if argument is True

Logical Functions & Operators

 Functions may be nested: =IF(A3>90,"A",IF(A3>80,"B","C"))

Given a numeric grade, find the corresponding letter grade. Example Problems

Time & Date Functions Random Number Functions

Time & Date Functions  TODAY()-returns the current date  NOW()-returns the current date and time  Format of the date/time can be modified

Random Number Functions  RAND()-returns a number greater than or equal to zero and less than one, evenly distributed. Changes on recalculation.  RANDBETWEEN(bottom, top)-returns a random number between the numbers you specify.

Finding Functions

 Formula Ribbon

Finding Functions  Insert Function button

Selecting Ranges

What is a Range?

Selecting Ranges  Use mouse to drag from top to bottom, or side to side  Select rectangular area by dragging to diagonal corners or using [shift] key  Select disconnected columns/rows by using [ctrl] key  Select a long row/column by using [ctrl][shift][end] key sequence  Range addresses may also be typed

Review Questions

Review Question Basic Math Operations What is the result of the following expression: =(1-2^3/2+4)*2 A.0 B.1 C.2 D.3 E.None of the above

Review Question Basic Math Functions What is the result of the following expression: =COUNT(A1:A6) A.3 B.4 C.5 D.6 E.None of the above

Review Question TrigonometryFunctions The RADIANS function is used to convert from radians to degrees. A.True B.False

Review Question Logical Functions & Operators What is the result of the following expression: =IF(OR(A1>10,B1>10),25,0) A.0 B.10 C.20 D.25 E.None of the above

Review Question Finding Functions Which of the following can help you find/use a specific function: A.0 B.1 C.2 D.All of the above E.None of the above

Homework Help ‘n Hints