1. CIS300 Exam 4 Review Dale McIntosh © 2009 Dale McIntosh. All Rights Reserved.Spring 2009

2. © 2009 Dale McIntosh. All Rights Reserved. CIS 300 Exam 3 Content Chapter 10: Decision Support Systems and Expert Systems Chapter 14: Decision Support Systems and Expert Systems All assigned course Homework

3. © 2009 Dale McIntosh. All Rights Reserved. CIS300 Cumulative Microsoft  Excel  Functions Additional Functions INDEX MATCH LOOKUP What-If Analysis Tool

4. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions Syntax: =INDEX(array,row_num,[column_num]) Arguments: array Required  A range of cells or an array constant. row_num Optional  Selects the row in array from which to return a value. o If row_num is omitted, column_num is required. column_num Optional  Selects the column in array from which to return a value. o If column_num is omitted, row_num is required.

5. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions Description: Returns the value of an element in a table or an array, selected by the row and column number indexes. Remarks: If both the row_num and column_num arguments are used, INDEX returns the value in the cell at the intersection of row_num and column_num. Errors: #REF! – If row_num and column_num do not point to a cell within array

6. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions

7. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions Syntax: =MATCH(lookup_value, lookup_array, [match_type]) Arguments: lookup_value Required  The value that you want to match in lookup_array. lookup_array Required  The range of cells being searched. match_type Optional  Specifies how Excel matches lookup_value with values in lookup_array. o The number -1, 0, or 1

8. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions Description: Searches for a specified item in a range of cells, and then returns the relative position of that item in the range Remarks: The lookup_value argument can be a value (number, text, or logical value) or a cell reference to a number, text, or logical value. MATCH returns the position of the matched value within lookup_array, not the value itself. MATCH does not distinguish between uppercase and lowercase letters when matching text values. Errors: #N/A – If MATCH is unsuccessful in finding a match

9. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions ValueBehaviorRestrictions 1 MATCH finds the largest value that is less than or equal to lookup_value. The values in the lookup_array argument must be placed in ascending order. 0 MATCH finds the first value that is exactly equal to lookup_value. None MATCH finds the smallest value that is greater than or equal to lookup_value. The values in the lookup_array argument must be placed in descending order. Default

10. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions

11. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Information Functions Description: A combination of INDEX and MATCH can be used as a form of table lookup. It is similar to the VLOOKUP and HLOOKUP function but more flexible. It is usually of the form: =INDEX(some_array, MATCH(some_value, some_array, criteria), [MATCH(some_value, some_array, criteria)])

12. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Information Functions =INDEX(A1:B5,MATCH("Oranges",A1:A5,0),MATCH ("Count",A1:B1,0)) OR =INDEX(B1:B5, MATCH("Oranges",A1:A5,0)) How would you find the count of oranges using INDEX and MATCH?

13. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions Syntax: =LOOKUP(value, lookup_range, result_range) Arguments: value Required  The value to search for in the lookup_range. lookup_range Required  A single row or single column of data that is sorted in ascending order. result_range Required  a single row or single column of data that is the same size as the lookup_range.

14. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions =LOOKUP(10251, A5:A10, B1:B10) =“Tofu” =LOOKUP(10245, A5:A10, B1:B10) =#N/A

15. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions Helps calculate different scenarios. For example the table below calculated Total Profit

16. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions

17. © 2009 Dale McIntosh. All Rights Reserved. Microsoft ® Excel ® Lookup Functions One time summary table can be created.