ITrendline

```
public interface ITrendline
```
Represents a trendline in a chart. A trendline shows the trend, or direction, of data in a series.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`clearFormats()` Clears the formatting of the object.
`void`	`delete()` Deletes the object.
`double`	`getBackward()` Gets the number of periods (or units on a scatter chart) that the trendline extends backward.
`boolean`	`getDisplayEquation()` Gets whether to display the equation for the trendline (True if the equation for the trendline is displayed on the chart, in the same data label as the R-squared value).
`boolean`	`getDisplayRSquared()` Gets whether to display the R-squared value (True if the R-squared value of the trendline is displayed on the chart, in the same data label as the equation).
`IChartFormat`	`getFormat()` Returns the format for chart elements.
`double`	`getForward()` Gets the number of periods (or units on a scatter chart) that the trendline extends forward.
`int`	`getIndex()` Returns the index number of the object within the collection of similar objects.
`double`	`getIntercept()` Gets the point where the trendline crosses the value axis.
`java.lang.String`	`getName()` Gets the name of the object.
`boolean`	`getNameIsAuto()` Gets if the trendline's name is automatically determined.
`int`	`getOrder()` Gets the trendline order (an integer greater than 1) when the trendline type is Polynomial.
`ISeries`	`getParent()` Returns the parent object for the specified object.
`int`	`getPeriod()` Gets the period for the moving-average trendline.
`TrendlineType`	`getType()` Gets the trendline type.
`void`	`setBackward(double value)` Sets the number of periods (or units on a scatter chart) that the trendline extends backward.
`void`	`setDisplayEquation(boolean value)` Sets whether to display the equation for the trendline (True if the equation for the trendline is displayed on the chart, in the same data label as the R-squared value).
`void`	`setDisplayRSquared(boolean value)` Sets whether to display the R-squared value (True if the R-squared value of the trendline is displayed on the chart, in the same data label as the equation).
`void`	`setForward(double value)` Sets the number of periods (or units on a scatter chart) that the trendline extends forward.
`void`	`setIntercept(double value)` Sets the point where the trendline crosses the value axis.
`void`	`setName(java.lang.String name)` Sets the name of the object.
`void`	`setNameIsAuto(boolean value)` Sets if the trendline's name is automatically determined.
`void`	`setOrder(int value)` Sets the trendline order (an integer greater than 1) when the trendline type is Polynomial.
`void`	`setPeriod(int value)` Sets the period for the moving-average trendline.
`void`	`setType(TrendlineType value)` Sets the trendline type.

- Method Detail
  - getIndex
```
int getIndex()
```
    Returns the index number of the object within the collection of similar objects.
  - getBackward
```
double getBackward()
```
    Gets the number of periods (or units on a scatter chart) that the trendline extends backward.
  - setBackward
```
void setBackward(double value)
```
    Sets the number of periods (or units on a scatter chart) that the trendline extends backward.
  - getDisplayEquation
```
boolean getDisplayEquation()
```
    Gets whether to display the equation for the trendline (True if the equation for the trendline is displayed on the chart, in the same data label as the R-squared value). Setting this property to True automatically turns on data labels.
  - setDisplayEquation
```
void setDisplayEquation(boolean value)
```
    Sets whether to display the equation for the trendline (True if the equation for the trendline is displayed on the chart, in the same data label as the R-squared value). Setting this property to True automatically turns on data labels.
  - getDisplayRSquared
```
boolean getDisplayRSquared()
```
    Gets whether to display the R-squared value (True if the R-squared value of the trendline is displayed on the chart, in the same data label as the equation). Setting this property to True automatically turns on data labels.
  - setDisplayRSquared
```
void setDisplayRSquared(boolean value)
```
    Sets whether to display the R-squared value (True if the R-squared value of the trendline is displayed on the chart, in the same data label as the equation). Setting this property to True automatically turns on data labels.
  - getFormat
```
IChartFormat getFormat()
```
    Returns the format for chart elements.
  - getForward
```
double getForward()
```
    Gets the number of periods (or units on a scatter chart) that the trendline extends forward.
  - setForward
```
void setForward(double value)
```
    Sets the number of periods (or units on a scatter chart) that the trendline extends forward.
  - getIntercept
```
double getIntercept()
```
    Gets the point where the trendline crosses the value axis.
  - setIntercept
```
void setIntercept(double value)
```
    Sets the point where the trendline crosses the value axis.
  - getName
```
java.lang.String getName()
```
    Gets the name of the object.
  - setName
```
void setName(java.lang.String name)
```
    Sets the name of the object.
  - getNameIsAuto
```
boolean getNameIsAuto()
```
    Gets if the trendline's name is automatically determined.
  - setNameIsAuto
```
void setNameIsAuto(boolean value)
```
    Sets if the trendline's name is automatically determined.
  - getOrder
```
int getOrder()
```
    Gets the trendline order (an integer greater than 1) when the trendline type is Polynomial.
  - setOrder
```
void setOrder(int value)
```
    Sets the trendline order (an integer greater than 1) when the trendline type is Polynomial.
  - getParent
```
ISeries getParent()
```
    Returns the parent object for the specified object.
  - getPeriod
```
int getPeriod()
```
    Gets the period for the moving-average trendline.
  - setPeriod
```
void setPeriod(int value)
```
    Sets the period for the moving-average trendline.
  - getType
```
TrendlineType getType()
```
    Gets the trendline type.
  - setType
```
void setType(TrendlineType value)
```
    Sets the trendline type.
  - clearFormats
```
void clearFormats()
```
    Clears the formatting of the object.
  - delete
```
void delete()
```
    Deletes the object.

Interface ITrendline

Method Summary

Method Detail

getIndex

getBackward

setBackward

getDisplayEquation

setDisplayEquation

getDisplayRSquared

setDisplayRSquared

getFormat

getForward

setForward

getIntercept

setIntercept

getName

setName

getNameIsAuto

setNameIsAuto

getOrder

setOrder

getParent

getPeriod

setPeriod

getType

setType

clearFormats

delete