## Trendline::SetBackward method


Returns or sets the number of periods (or units on a scatter chart) that the trendline extends backward. The number of periods must be greater than or equal to zero. If the chart type is column ,the number of periods must be between 0 and 0.5.

```cpp
void Aspose::Cells::Charts::Trendline::SetBackward(double value)
```

## See Also

* Class [Vector](../../../aspose.cells/vector/)
* Class [Trendline](../)
* Namespace [Aspose::Cells::Charts](../../)
* Library [Aspose.Cells for C++](../../../)