Lec01 Intro Basics

8/12/2019 Lec01 Intro Basics

1/41

OPIM 529

Lecture 1

Can Akkan


2/41

Topics

Excel basics

SUMPRODUCT formula

Conditional Counting and Summing IF, COUNTIF and SUMIF formulas


3/41

3

MS Excel

It is one of the most important tools youwill use in your education and work.

Data analysis

Average, minimum, maximum spending bycustomers?

Graphing data (for analysis and presentation)

Graph of age of customers versus amount spentby them.


4/41

4

MS Excel

Simple database functionality

Find the customers whose income is above$40,000, who are married and have at least one

child. Developing quantitative models for business

problems

Where should I locate my warehouse to minimize

transportation costs.


5/41

Regional SettingsEnglish (US)

5


6/41

Example 1

We enter a formula by first typing = Revenue = Price x quantity sold

Most formulas refer to a cell by a cell reference Cell reference B5 refers to the price of Mug 1

6

Lec1_ex5.mp4


7/41

Example1

You can copy and paste a formula

Goto cell D5

Press Ctrl + C (shortcut for copy)

Go to cell D6

Press Ctrl + V (shortcut for paste)

Select D7:D11

Press Ctrl + V to paste

7


8/41

Example 1

There are formulas to do certain common tasks,e.g. summation

8


9/41

Example 1

Now copy the SUM formula and paste it to cellD12.

You should get the following:

9


10/41

10

Example 2

Type the following:

Cell B4: Price

Cell C4: Quantity

Cell D4: Revenue

Cell B5: 3

Cell C5: 5


11/41

11

Example 2 - Entering a Formula

Lets calculate the revenue

Recall: Excel formula starts with =


12/41

12

Example 2 - Copying Formula

Lets copy (Ctrl+C) and then paste (Ctrl+V)the revenue formula to

Cell E5

Cell D6

Cell E7

Press F2 when the cursor is on these cells

Where are the formulas referring to?


13/41

13

Example 2 -Relative Referencein Excel Formula


14/41

14

Example 2 - Copy-Paste theRange

Copy B4:D5 range to B10:D11


15/41

15

Example 2 - Using the $ sign inFormula

In cell D11 type =B$11*$C11

Now copy-paste the formula to

Cells E11,D12 and E13


16/41

16

Example 2 - The Effect of $ InFormulae


17/41

17

Example 3

Using SUMPRODUCT

Go to sumproduct worksheet

Calculate total revenue

First, using multiplication and summation

Then, using SUMPRODUCT


18/41

18

Example 3

In a cell if you press the function key F2 you

Get the display shown below Color coded cell references

Can edit the formula directly within the cell.


19/41

19

Example 4

A retailers data on its customers and theirpurchases. Note the comments entered for each column header.

Right-click the mouse select Insert Comment

Note the currency format used for Salary andAmountSpent


20/41

20

MS ExcelShortcuts

Knowing certain shortcuts can speed upthe work you do in Excel dramatically.

Select any cell in the table

Press CTRLdown arrow, then CTRLright arrow, then CTRLup arrow, etc.


21/41

21

Example 4

Task 1: Insert a new column to the left of the

table and title it "Customer ID". There are at least 2 slightly different ways

of doing this. Fill the "Customer ID" column by

numbers 1 through 1000 Fill in the first three entries 1, 2 and 3

Select these cells

Double click on the fill handle when thecursor turns into a cross.

Excel fills in up to 1000 because there is acolumn with 1000 rows next to it.

Fill handle


22/41

22

MS ExcelShortcuts

When the range in a formula is long do notuse the mouse the select it. Use CTRL-SHIFT-arrow

typically down-arrow or right-arrow SHIFT lets you select multiple cells.

Similarly when you copy a long range. Select with CTRL-SHIFT-arrow

Copy with CTRL-C

Paste with CTRL-V


23/41

23

Example 4

Task 2: In cell B2 enter "Average" and then calculate the averages of

columns C through I in cell C2 through I2. In cell C2 the formula should be =AVERAGE(C3:C1003)

Then copy the formula (can use drag handle) to the other cells.

Pay attention to the formats. You can adjust significant digits by the buttons:

You can copy the format of the currencies by the format painter


24/41

24

Example 4

Task 3: Calculate total and average amount spent by male

customers. Use SUM formula to calculate the number of males

Use SUMPRODUCT formula to calculate total amount spentby males: =SUMPRODUCT(I4:I1003, C4:C1003)

Calculate average AmtSpent for males


25/41

25

Example 4

Task 4: Copy and paste (in one step) the "Gender","Married" and "Children" columns to columns P, Qand R.

CTRL lets you select multiple disjoint cells/ranges.

Use CTRL-Shift-down arrow to select Gender column

Holding down CTRL key, left-click the mouse on top ofMarried column

Press CTRL-Shift-down arrow to select Married column

Do the same for Children column

Press CTRLC to copy the three columns

Select cell P3 and then press CTRLV


26/41

26

Example 5Logical Conditions in Excel

Video availbale in Media Gallery

Type the following in cells A1, A2 and A3

=(1=1)

=(1 > 3)

=(3


27/41

27

Example 6

Video availbale in Media Gallery

Data on some households

Objective: categorize utility expenses asnormal or high

More than $250 -> high, otherwise normal


28/41

28

Example 6Simple IF

Excels IF function

IF(logical condition, returned value ifcondition is true, returned value if

condition is false) In cell F3 type

=IF(C3>$F$1, "high", "normal")

" " symbols are used to denote that a text(called string in computer science) is beingreturned


29/41

Example 6Simple IF

Value parts could also have

Empty Text: =IF(C3>$F$1,"high","")

Number: =IF(C3>$F$1, 1, 0)

Formula: = IF(C3>$F$1, D3*C3, (1-D3)*B3)

29


30/41


31/41

31

Example 6Nested IF

In cell G3write

=IF(F3="high",IF(D3=1,1,0),0)

One can write different nested IF functionsthat do the same job

Think of alternative ways of doing this


32/41

32

Example 6AND Function

Since we have multiple conditions that must beTRUE, we can use the AND function

First go back to Ex 5 worksheetandin cell A4type=AND((1=1), (1>3))

Can also write=AND(A1, A2)

Try above in cell A5 In cell A6, type

=AND(A1,A3)


33/41

33

Example 6AND Function

Now use IF and AND functions todetermine people with bothhigh utility expense and owns her home.

In cell H3write

=IF(AND(F3="high",D3=1), 1,0)


34/41

Example 7

No video in Media Gallery.

Two useful functions with IF functionality

COUNTIF(range, criteria)

SUMIF(range, criteria, [sum range]) Note: parameter in square brackets is optional

34


35/41

Example 7

35


36/41

36

Good Spreadsheet Design

Useful spreadsheet models should have thefollowing properties:

Must provide accurate results

cross-checking, batch totals, breaking down lengthy formulasinto smaller steps can help reduce errors.

Must be understood both by their creators and users. Clear and complete descriptions, consistent approach to

layout

Be adaptable to changes

Must be efficient for the user to locate and observecritical portions of it


37/41

37


Some suggestions:

Planning saves time and trouble: Before turning onthe computer lay out a tentative structure of the modelon paper.

Document the worksheet: you should design yourmodel so that six months from now you canremember the purpose of the template and how itworks.

Color-code input data: We will use blue-background.Might also color-code important outputs, or cellscontaining random functions.


38/41

38


Use an effective layout:

In general a good layout should be vertical ratherthan horizontal.

Spreadsheet should begin with an identification (adescriptive title, authors name, date of creation).

Separate areas of different use. Data sectionshould be separate from the work area.

Description of all constants, variable, assumptionsshould be written.


39/41

39


Pay attention to alignment and format:

Put labels over all columns.

Use currency & comma formats where appropriate.

Use an integer format where decimal accuracy isnot needed.

Arrange all worksheet data in either columns orrows, not a combination of both.

Each input data should be entered only once. If for clarity purposes it is to be repeated, this

should be done by using cell references or rangenames.


40/41


41/41


Protect your worksheet from unintendedchanges:

Use Worksheet and Cell Protection options to

prevent mistaken entry into or erasure of importantcells.

Lec01 Intro Basics

Documents

Transcript of Lec01 Intro Basics