ME 142 Engineering Computation I Excel Functions

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

Finding Functions  Formula Ribbon

Finding Functions  Insert Function button

Sum and AutoSum  Sum =SUM(range)  AutoSum Note auto-selection of row/column

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

Basic Math Functions 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

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

Logical 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 Operators

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