Day 11: Excel Chapter 8-10

DAY 11:EXCEL CHAPTER 8-10

Rahul [email protected]

September 24, 2013

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LAST CLASS

• Nested Functions• Logical Functions• Lookup/Reference Functions• Filtering Functions• One Variable What-If Analysis

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TWO VARIABLE WHAT-IF

• Similar to one variable• One variable goes in the first column, the

other in the top row• Can only calculate results for one formula

(In one variable analysis you can do any number of formulas. We did individual payments and cumulative payments.)

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TWO VARIABLE WHAT-IF EXAMPLE

• Setup your variables in the first column and top row

• Add a formula in the empty cell in the variable row and column

• Use the What-If Data Table tool, specifying both the row and column input cells– Data->Data Tools->What-If Analysis->Data

Table

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GOAL SEEK

• Goal seek allows you to alter one variable to obtain the desired result of a single equation

• Data->Data Tools->What-If Analysis->Goal Seek

• Example:– You want to buy a car for $15,000. You are

able to obtain a 5 year loan at 6% APR. You would like your monthly payment to be $200. How large of a down payment must you make?

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SCENARIO MANAGER

• Scenario Manager is a what-if analysis tool that allows you to define up to 32 scenarios to compare their effects on calculated results

• Data->Data Tools->What-If Analysis->Scenario Manager

• Example: Profit calculations for a business based on units sold, production cost per unit, shipping cost per unit

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ADDING SCENARIOS

• Data->Data Tools->What-If Analysis->Scenario Manager

• Add…– Scenario name– Changing cells– Set values for each cell

• Example:– Best Case: 75,000 units, $38/unit production cost,

$0.30/unit shipping cost– Likely Case: 50,000, $42.95, $0.5– Worst Case: 25,000, $48, $0.75

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WORKING WITH SCENARIOS

• Delete• Edit• Show• Summary

– Regular summary– PivotTable summary

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SOLVER

• Solver is similar to goal seek, but it allows multiple input values to change

• Solver is an Add-In, so it must be loaded before you can use it– File->Options->Add-Ins->Manage: Excel Add-

Ins-> Go…– Check “Solver Add-in”-> OK

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SOLVER EXAMPLE

• Maximize profits for cabinet door manufacture by selecting how many of each door type to produce

• Changing Variables (green)• Objective (blue)• Constraints (red)

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EXAMPLE CONTINUED

• Data->Analysis->Solver• Specify Objective

– Max, min, or specific value

• Specify cells to vary• Specify constraints

– Single cells or ranges– Include non-negativity constraints

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SOLVING

• Chose a solving method:– GRG Nonlinear: guaranteed local optimal– Simplex LP: guaranteed global optimal, must

be linear– Evolutionary: good solutions for non smooth

functions

• Solve

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HYPERLINKS

• Insert->Links->Hyperlink– Inserts a link to a:

• File/Document• Web site• Email address

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3D FORMULAS

• 3D formulas are formulas that use references from other sheets– ‘Worksheet name’!Range

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TEMPLATES

• File->New->– Recent Templates– Sample Templates– My Templates– Office.com Templates

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CELL STYLES

• Home->Styles->Cell Styles– Existing Styles– New Styles

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QUESTIONS

• This is the last lecture on Excel. If you have any questions you want answered before the exam, ask now.

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NEXT CLASS

• Introductory Database concepts