title as parameter for TimeSeries.plot() (#2639)

CHANGELOG.md

@@ -12,6 +12,7 @@ but cannot always guarantee backwards compatibility. Changes that may **break co
 **Improved**
 
 - New model: `StatsForecastAutoTBATS`. This model offers the [AutoTBATS](https://nixtlaverse.nixtla.io/statsforecast/src/core/models.html#autotbats) model from Nixtla's `statsforecasts` library. [#2611](https://github.com/unit8co/darts/pull/2611) by [He Weilin](https://github.com/cnhwl).
+- Added the `title` attribute to `TimeSeries.plot()`. This allows to set a title for the plot. [#2639](https://github.com/unit8co/darts/pull/2639) by [Jonathan Koch](https://github.com/jonathankoch99).
 - Added parameter `component_wise` to `show_anomalies()` to separately plot each component in multivariate series. [#2544](https://github.com/unit8co/darts/pull/2544) by [He Weilin](https://github.com/cnhwl).
 
 **Fixed**

darts/timeseries.py

@@ -4077,6 +4077,7 @@ def plot(
         low_quantile: Optional[float] = 0.05,
         high_quantile: Optional[float] = 0.95,
         default_formatting: bool = True,
+        title: Optional[str] = None,
         label: Optional[Union[str, Sequence[str]]] = "",
         max_nr_components: int = 10,
         ax: Optional[matplotlib.axes.Axes] = None,
@@ -4106,6 +4107,8 @@ def plot(
             interval is shown if `high_quantile` is None (default 0.95).
         default_formatting
             Whether to use the darts default scheme.
+        title
+            Optionally, a custom plot title. If `None`, will use the name of the underlying `xarray.DataArray`.
         label
             Can either be a string or list of strings. If a string and the series only has a single component, it is
             used as the label for that component. If a string and the series has multiple components, it is used as
@@ -4254,7 +4257,7 @@ def plot(
                     )
 
         ax.legend()
-        ax.set_title(self._xa.name)
+        ax.set_title(title if title is not None else self._xa.name)
         return ax
 
     def with_columns_renamed(