## Libraries.Compute.Statistics.Charts.BarChartCreator Documentation

This class is used to create a Bar Chart from columns of data in a DataFrame. There are four ways to make a bar chart from the data frame using this class: 1. One factor or one text-column: Each unique item will have its own bar using its frequency as the value. 2. One or more numerical columns without a factor: Each column will have its own bar using its sum as the value. 3. One or more numerical columns with a factor: The values associated with each factor will be in one bar group, containing a bar for each column. 4. One column with two factors: The values associated with both factors will get one bar, they will be grouped by factor1 and colored by factor2.

Example Code

use Libraries.Compute.Statistics.DataFrame
use Libraries.Compute.Statistics.Charts.BarChartCreator

DataFrame frame

//Create a Bar Chart and set some properties
BarChartCreator creator
creator:SetXSteps(4)

Chart chart = frame:CreateChart(creator)
chart:Display(2000,1000)

## Actions Documentation

This action adds a value to the end of the input.

#### Parameters

• integer column

This action adds a value to the end of the input.

#### Parameters

• integer column

### Compare(Libraries.Language.Object object)

This action compares two object hash codes and returns an integer. The result is larger if this hash code is larger than the object passed as a parameter, smaller, or equal. In this case, -1 means smaller, 0 means equal, and 1 means larger. This action was changed in Quorum 7 to return an integer, instead of a CompareResult object, because the previous implementation was causing efficiency issues.

#### Return

integer: The Compare result, Smaller, Equal, or Larger.

Example

Object o
Object t
integer result = o:Compare(t) //1 (larger), 0 (equal), or -1 (smaller)

### Create(Libraries.Compute.Statistics.DataFrame frame, boolean sort)

This action creates and returns a chart, of any kind, using the parameters in the subclass.

#### Return

Libraries.Interface.Controls.Charts.Chart: A chart object, which can be embedded into a user interface

Example

use Libraries.Compute.Statistics.DataFrame
use Libraries.Compute.Statistics.Charts.BarChartCreator
use Libraries.System.File

DataFrame frame

//We might instantiate an object to create a bar chart, setting some properties if we want to
BarChartCreator create
frame:CreateChart(create)

### Create(Libraries.Compute.Statistics.DataFrame frame)

#### Return

Libraries.Interface.Controls.Charts.Chart

### CreateChartBySum(Libraries.Compute.Statistics.DataFrame frame)

#### Return

Libraries.Interface.Controls.Charts.Chart

### EmptyColumns()

This action empty's the list, clearing out all of the items contained within it.

### EmptyFactors()

This action empty's the list, clearing out all of the items contained within it.

### Equals(Libraries.Language.Object object)

This action determines if two objects are equal based on their hash code values.

#### Return

boolean: True if the hash codes are equal and false if they are not equal.

Example

use Libraries.Language.Object
use Libraries.Language.Types.Text
Object o
Text t
boolean result = o:Equals(t)

### GetColumn(integer index)

This action gets the item at a given location in an array.

#### Parameters

• integer index

#### Return

integer: The item at the given location.

### GetColumnIterator()

This action gets an iterator for the object and returns that iterator.

#### Return

Libraries.Containers.Iterator: Returns the iterator for an object.

### GetColumnSize()

This action gets the size of the array.

integer:

### GetFactor(integer index)

This action gets the item at a given location in an array.

#### Parameters

• integer index

#### Return

integer: The item at the given location.

### GetFactorIterator()

This action gets an iterator for the object and returns that iterator.

#### Return

Libraries.Containers.Iterator: Returns the iterator for an object.

### GetFactorSize()

This action gets the size of the array.

integer:

### GetHashCode()

This action gets the hash code for an object.

#### Return

integer: The integer hash code of the object.

Example

Object o
integer hash = o:GetHashCode()

### IsEmptyColumns()

This action returns a boolean value, true if the container is empty and false if it contains any items.

#### Return

boolean: Returns true when the container is empty and false when it is not.

### IsEmptyFactors()

This action returns a boolean value, true if the container is empty and false if it contains any items.

#### Return

boolean: Returns true when the container is empty and false when it is not.

### RemoveColumn(integer column)

This action removes the first occurrence of an item that is found in the Addable object.

#### Parameters

• integer column

#### Return

boolean: Returns true if the item was removed and false if it was not removed.

### RemoveColumnAt(integer index)

This action removes an item from an indexed object and returns that item.

#### Parameters

• integer index

### RemoveFactor(integer column)

This action removes the first occurrence of an item that is found in the Addable object.

#### Parameters

• integer column

#### Return

boolean: Returns true if the item was removed and false if it was not removed.

### RemoveFactorAt(integer index)

This action removes an item from an indexed object and returns that item.

#### Parameters

• integer index