Lecture # 7 Spreadsheet Basics

I have two coins in my hand that total 55¢. One is not a nickel. What are the two coins?

Today Questions: From notes/reading/life? Review Quiz # 1 1.Introduce: How do solve problems? 2.Explain: Formulas, Expressions, Numerical Limits, Formatting, Moving things, Functions Dynamic Recomputation, Records 3.Demo: Spreadsheet Magic – follow along on laptop 4.Practice: You solve a problem with a spreadsheet 5.Evaluate: Share and evaluate your solution 6.Re-practice:Create a Budget with a spreadsheet Review Spreadsheet Functions Understand Dynamic Recomputation

Today Questions: From notes/reading/life? Review Quiz # 1 1.Introduce: How do solve problems? 2.Explain: Formulas, Expressions, Numerical Limits, Formatting, Moving things, Functions Dynamic Recomputation, Records 3.Demo: Spreadsheet Magic – follow along on laptop 4.Practice: You solve a problem with a spreadsheet 5.Evaluate: Share and evaluate your solution 6.Re-practice:Create a Budget with a spreadsheet Review Spreadsheet Functions Understand Dynamic Recomputation

A Problem: Wages = $6.25 per hour Hours worked = 25 Compute the total pay:

What are some ways to solve this problem?

Paper and Pencil

Use a calculator

Write a Program Wages = 6.25; HoursWorked = 25; Total Pay = 6.25 * 25 Wages$6.25 HoursWorked TotalPay

Write a Program Wages = 6.25; HoursWorked = 25; Total Pay = 6.25 * 25 Wages$6.25 HoursWorked25 TotalPay

Write a Program Wages = 6.25; HoursWorked = 25; Total Pay = 6.25 * 25 Wages$6.25 HoursWorked25 TotalPay$156.25

Use a Spreadsheet

Spreadsheets The program that created the modern personal computer.

Today Questions: From notes/reading/life? Review Quiz # 1 1.Introduce: How do solve problems? 2.Explain: Formulas, Expressions, Numerical Limits, Formatting, Moving things, Functions Dynamic Recomputation, Records 3.Demo: Spreadsheet Magic – follow along on laptop 4.Practice: You solve a problem with a spreadsheet 5.Evaluate: Share and evaluate your solution 6.Re-practice:Create a Budget with a spreadsheet Review Spreadsheet Functions Understand Dynamic Recomputation

Type any text Type any number

Formulas are Expressions

A spreadsheet is an array B1 is the same as Book1[0,1] B2 is the same as Book1[1,1] Row-Col is the same as Book1[Row-1, Col- ’ A ’ ]

A cell expression is an assignment B4 = B1*B2 is the same as.... Book1[3,1] = Book1[0,1] * Book1[1, 1];

Demo time

Compute Social Security

Compute Payroll costs

Dynamic recomputation the power of a spreadsheet Change this Automatically recompute these

Why not just use a calculator? Change this Automatically recompute these

Fahrenheit to Celsius

Today Questions: From notes/reading/life? Review Quiz # 1 1.Introduce: How do solve problems? 2.Explain: Formulas, Expressions, Numerical Limits, Formatting, Moving things, Functions Dynamic Recomputation, Records 3.Demo: Spreadsheet Magic – follow along on laptop 4.Practice: You solve a problem with a spreadsheet 5.Evaluate: Share and evaluate your solution 6.Re-practice:Create a Budget with a spreadsheet Review Spreadsheet Functions Understand Dynamic Recomputation

Personal Exercise Create a spreadsheet that looks like the following slide Input data and calculate the cost per square foot Play with the costs and square footage to maximize your dollar per square foot given a budget of $75,000 Now make the kitchen 400 square feet and adjust the rest You have 10 minutes

Remodeling budget

How many $ for the microfilm library?

Why the decimal point? Integer Overflow -> Floating Point

Switch to Floating Point

Overflow

Underflow

What Else is Under the Hood? Formatting Moving things around Functions

Formatting Bold, Italic, Underline

If each cell has a value, where is the format stored? AB 1 2 3

Formatting Automatic, Left, Center, Right

Where do we store alignment? AB = Automatic 1 = Left 2 = Center 3 = Right

Why not use Booleans like bold and italic? AB = Automatic 1 = Left 2 = Center 3 = Right

Font Name and Size

Fill Color and Text Color

Cell Contents And there is a lot more

This kind of data structure is called a “record” And there is a lot more

Records (a collection of named things) Student

Records (a collection of named things) Student Student.GPA = 3.6; Student.Address = “ Reams 3 ” ;

Records (a collection of named things) Student Student.GPA = 3.6; Student.Address = “ Reams 3 ” ;

Records (a collection of named things) Student Student.GPA = 3.6; Student.Address = “ Reams 3 ” ;

An Array of Students Students

An Array of Students Students Students[1].Name = “ Ann ” ;

Number Formatting Demo Currency Comma formatted numbers Percents Decimals Format menu

Dates Demo Formatting Arithmetic on dates

What Else is Under the Hood? Formatting Moving things around Functions

Formatting  Moving things around Functions What Else is Under the Hood?

Moving Things Cut, Copy, Paste Adding Rows and Columns

Relative Cell References Copy from here Paste to here

Relative Cell References Copy from here Paste to here

Relative Cell References Copy from here Paste to here Add Rows moved to each row index Add Columns moved to each column index

Inserting a column

Inserting a row

Formatting Moving things around  Functions What Else is Under the Hood?

Functions Adding more things than arithmetic to expressions A = Min( 10, 20 ); A==10 B = Min(A+4,16); B == 14 C = Max(A+B, Min(200,50) ) C == Max(24,50) == 50

Functions - Demo Min Max Sqrt Sum Average Today

Questions: From notes/reading/life? Review Quiz # 1 1.Introduce: How do solve problems? 2.Explain: Formulas, Expressions, Numerical Limits, Formatting, Moving things, Functions Dynamic Recomputation, Records 3.Demo: Spreadsheet Magic – follow along on laptop 4.Practice: You solve a problem with a spreadsheet 5.Evaluate: Share and evaluate your solution 6.Re-practice:Create a Budget with a spreadsheet Review Spreadsheet Functions Understand Dynamic Recomputation