io.starter.formats.XLS.formulas

Class DatabaseCalculator

java.lang.Object

io.starter.formats.XLS.formulas.DatabaseCalculator

public class DatabaseCalculator
extends Object

DatabaseCalculator is a collection of static methods that operate as the Microsoft Excel function calls do. All methods are called with an array of ptg's, which are then acted upon. A Ptg of the type that makes sense (ie boolean, number) is returned after each method. Database and List Management functions Microsoft Excel includes worksheet functions that analyze data stored in lists or databases. Each of these functions, referred to collectively as the Dfunctions, uses three arguments: database, field, and criteria. These arguments refer to the worksheet ranges that are used by the function. DAVERAGE Returns the average of selected database entries DCOUNT Counts the cells that contain numbers in a database DCOUNTA Counts nonblank cells in a database DGET Extracts from a database a single record that matches the specified criteria DMAX Returns the maximum value from selected database entries DMIN Returns the minimum value from selected database entries DPRODUCT Multiplies the values in a particular field of records that match the criteria in a database DSTDEV Estimates the standard deviation based on a sample of selected database entries DSTDEVP Calculates the standard deviation based on the entire population of selected database entries DSUM Adds the numbers in the field column of records in the database that match the criteria DVAR Estimates variance based on a sample from selected database entries DVARP Calculates variance based on the entire population of selected database entries GETPIVOTDATA Returns data stored in a PivotTable ABOUT DB All Database Formulas take 3 arguments: Database is the range of cells that makes up the list or database. A database is a list of related data in which rows of related information are records, and columns of data are fields. The first row of the list contains labels for each column. Field indicates which column is used in the function. Field can be given as text with the column label enclosed between double quotation marks, such as "Age" or "Yield," or as a number that represents the position of the column within the list: 1 for the first column, 2 for the second column, and so on. Criteria is the range of cells that contains the conditions you specify. You can use any range for the criteria argument, * as long as it includes at least one column label and at least one cell below the column label for specifying a condition for the column. Make sure the criteria range does not overlap the list. TODO To change the template for this generated type comment go to Window - Preferences - Java - Code Style - Code Templates

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	DEBUG

Constructor Summary

Constructors

Constructor and Description
DatabaseCalculator()

Method Summary

Modifier and Type	Method and Description
protected static Ptg	calcDAverage(Ptg[] operands) DAVERAGE Returns the average of selected database entries
protected static Ptg	calcDCount(Ptg[] operands) DCOUNT Counts the cells that contain numbers in a database
protected static Ptg	calcDCountA(Ptg[] operands) DCOUNTA Counts nonblank cells in a database
protected static Ptg	calcDGet(Ptg[] operands) DGET Extracts from a database a single record that matches the specified criteria
protected static Ptg	calcDMax(Ptg[] operands) DMAX Returns the maximum value from selected database entries
protected static Ptg	calcDMin(Ptg[] operands) DMIN Returns the minimum value from selected database entries
protected static Ptg	calcDProduct(Ptg[] operands) DPRODUCT Multiplies the values in a particular field of records that match the criteria in a database
protected static Ptg	calcDStdDev(Ptg[] operands) DSTDEV Estimates the standard deviation based on a sample of selected database entries
protected static Ptg	calcDStdDevP(Ptg[] operands) DSTDEVP Calculates the standard deviation based on the entire population of selected database entries
protected static Ptg	calcDSum(Ptg[] operands) DSUM Adds the numbers in the field column of records in the database that match the criteria
protected static Ptg	calcDVar(Ptg[] operands) DVAR Estimates variance based on a sample from selected database entries
protected static Ptg	calcDVarP(Ptg[] operands)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEBUG

public static boolean DEBUG

Constructor Detail

DatabaseCalculator

public DatabaseCalculator()

Method Detail

calcDAverage

protected static Ptg calcDAverage(Ptg[] operands)

DAVERAGE Returns the average of selected database entries

calcDCount

protected static Ptg calcDCount(Ptg[] operands)

DCOUNT Counts the cells that contain numbers in a database

calcDCountA

protected static Ptg calcDCountA(Ptg[] operands)

DCOUNTA Counts nonblank cells in a database

calcDGet

protected static Ptg calcDGet(Ptg[] operands)

DGET Extracts from a database a single record that matches the specified criteria

calcDMax

protected static Ptg calcDMax(Ptg[] operands)

DMAX Returns the maximum value from selected database entries

calcDMin

protected static Ptg calcDMin(Ptg[] operands)

DMIN Returns the minimum value from selected database entries

calcDProduct

protected static Ptg calcDProduct(Ptg[] operands)

DPRODUCT Multiplies the values in a particular field of records that match the criteria in a database

calcDStdDev

protected static Ptg calcDStdDev(Ptg[] operands)

DSTDEV Estimates the standard deviation based on a sample of selected database entries

calcDStdDevP

protected static Ptg calcDStdDevP(Ptg[] operands)

DSTDEVP Calculates the standard deviation based on the entire population of selected database entries

calcDSum

protected static Ptg calcDSum(Ptg[] operands)

DSUM Adds the numbers in the field column of records in the database that match the criteria

calcDVar

protected static Ptg calcDVar(Ptg[] operands)

DVAR Estimates variance based on a sample from selected database entries

calcDVarP

protected static Ptg calcDVarP(Ptg[] operands)