IENG 423 Design of Decision Support Systems

1. IENG 423Design of Decision Support Systems Modeling with Excel Excel Basics Pivot Tables and Pivot Charts in Decision Support Systems

2. Pivot Tables Excel is very good at: Letting your organize your data, And do calculations on that data …and show you the results, …and redo the calculations, and… Excel is not so good at: Letting you change the layout of your data after you have set up the worksheet… ..at least in most cases

3. Pivot Tables Excel provides a powerful tools to let you organize and present your data in different ways… They are called “Pivot Tables” Its very flexible in terms of what you want to display as column and what are rows In fact, it is trivially easy to change that… make rows into columns and columns into rows That is why they are called pivot tables… you can pivot you data tables (lists)

4. Pivot Tables Does that impress everyone? Everyone say “ooooh!” Me either

5. Pivot Tables But what does impress me… … is that Pivot tables allow you to summarize data in a worksheet … Across one, two or three dimensions… …think crosstab tables Like product output by factory and month

6. Pivot Tables There’s a bit of a catch… The data to be used as input for a pivot table must be organized like a data list (data base) That is, each row must be represent one entity A test event Performance for a factory for a reporting period …

7. Pivot Tables To create a Pivot Table Select a cell in the original data Click on Data on the toolbar The select Pivot Table and Pivot Chart Report…. Next you will see the Pivot Table/Pivot Chart Wizard

8. Pivot Tables In the Pivot Table/Pivot Chart Wizard Identify the source of data for your table Indicate whether you want a Pivot Table or Pivot Chart Click Next Then confirm or select the data range to be input for your Pivot Chart Click Next Indicate whether you want your Pivot Table on an existing worksheet or a new worksheet Click Finish

9. Pivot Tables Now you will see a Pivot table shell (nothing in it), and a field list box Drag and place the fields where you want them to build the table As you drop the field header, Excel will start to populate the Pivot table …but wait, there’s more…

10. Pivot Tables Do CreatePivot Exercise on pg. 157 of Frye book Open CreatePivot.xls

11. Pivot Tables Explore Pivot Table Toolbar

12. Pivot Tables You can Filter data Change the calculations done on Pivot table source data Form Pivot Tables, just like other cells Collapse/Expand subcategories Rearrange the table as you please

13. Pivot Charts Pivot Charts are graphic representations of Pivot Tables Pivot Charts are data charts just like we saw when we looked at Charts and Graphs… …but tied to the data in the Pivot Table

14. Pivot Charts You can select Pivot Chart when you are creating Pivot Table/Pivot Chart… ..or… Select the Pivot Chart wizard after you have created you Pivot Table Note: your Pivot Chart is tied to your Pivot Table… …if you change the underlying Pivot Table, the Pivot Chart changes

15. Pivot Tables and Pivot Charts In a real world application it will not be unusual for you to want to create a Pivot Table or Pivot Chart from another (outside of Excel) data source There are several ways to do this One is to import a text file into Excel Try importing Export.txt into Excel