Lecture 6 spreadsheets
-
Upload
bbamumu2014 -
Category
Education
-
view
63 -
download
0
Transcript of Lecture 6 spreadsheets
2
Objectives
Know and understand the basics of spreadsheets Apply spreadsheets to solve real world problems Be able to format and present data using
spreadsheet programs Be able to create simple charts using
spreadsheet data
3
What is a spreadsheet?
ANY large sheet with rows and columns
A spreadsheet is like one BIG table, it has columns that are numbered A, B, C…
4
Why use spreadsheets?Used to perform numerical
calculationsAutomated and speed up
calculationsEasily used in organising and
presenting large amounts of dataUsed to analyse data
6
Some other Spreadsheet Programs
OpenOffice.Org CalcMicrosoft ExcelLotus 1-2-3
Simple ExerciseStart OpenOffice.org CalcClose OpenOffice.org Calc
10
Exercise
Type the following in the given cell IEDS Computer Literacy Marks (A1) Name (A3) Assignment 1 (B3) Test1 (C3) Type any names of three people in A4,A5,A6 Type imaginary marks in B4,B5,B6 and
C4,C5,C6
11
What is entered in cells?
Labels – Descriptive text, enhances spreadsheet
Values – numbers for calculations
Formulae (plural of fomula)–calculation instruction–can contain cell references, operators, functions–result appears in cell–function appears in formula bar
Function–preprogrammed /common formulas
12
Review
What are spreadsheets and why use them? Layout of a basic spreadsheet window The spreadsheet work area and how it works
13
Principle of Calculations
Calculations are a combination of–operators (symbols used in calculations)–values (numbers for calculations)–cell references (unique cell identification)–functions (pre-programmed /common formulas)
Results appear in the active cell
14
Some Operators in calculations
= Equals^ Exponent* Multiplication/ Division+ Addition- Subtraction
15
Using values in spreadsheets
Try out the following calculations=1500+800=10000-4000=15/3=4*1000=4 ^2
16
Exercise Use spreadsheet to calculate the following
problems: (use values and operators only) Age Number of years to stay at university Amount of tuition per semester Total amount of money spent on tuition for entire
university education Personal weekly expenditure Total personal expenditure in entire time in
university Total amount of money spent by sponsor (tuition
and upkeep) while in university
17
Cell references
Unique name of each cell in the spreadsheet Replace values with cell references to desired
value Update the university expenses spreadsheet to
reflect cell references instead of values
18
Advantages of using cell references
Able to reuse value without typing out second time
Calculations updated when changes occur
19
Functions
Predefined operation (formulas)Performed on a block of data in
spreadsheetHelp to ease workReplace simple common formulae
(A formula is sometimes called an equation. It is a specification or description of a calculation.)
20
Structure of Function
NameArgumentArgument can be block of data, cell reference,or a combination of the two.=FUNCTION_NAME(arguments )=SUM(B8:B12 )
22
Using Functions
FUNCTION_NAME(argument )
SUM(A3:B10)
SUM(A3;B4;C6)
AVERAGE(A3:B10)
AVERAGE(A3;B4;C6)
23
Formulae
Plural of FormulaRule of calculationA combination of cell references
and operatorsCreated because of a certain need
24
Exercise
Create simple spreadsheet for when you go to supermarket– Work out how much change you should be given– Improve on the spreadsheet to include particulars of items bought
25
Review
Calculations in spreadsheets involve–operators–values–cell references–functions
These are combined in various ways to get desired results
Values generated appear in the active cell Formulae are combination of cell references
and operators