diff --git a/oemoflex/tools/plots.py b/oemoflex/tools/plots.py
index b7d5fa5..6f42e82 100644
--- a/oemoflex/tools/plots.py
+++ b/oemoflex/tools/plots.py
@@ -220,6 +220,12 @@ def prepare_dispatch_data(df, bus_name, demand_name, labels_dict=None):
     replaced by more simple names. Columns the same name are grouped together. Really small
     numerical values which are practically zero are replaced with 0.0.
 
+    The DataFrame `df` is expected to have this form:
+
+    .. csv-table::
+       :file: ../../tests/_files/plot_data/input_prepare_dispatch_data.csv
+       :header-rows: 1
+
     Parameters
     ---------------
     df : pandas.DataFrame
@@ -271,6 +277,12 @@ def filter_timeseries(df, start_date=None, end_date=None):
     If start_date or end_date are not given, filtering is done from the first
     available date or to the last available date.
 
+    The DataFrame `df` is expected to have this form:
+
+    .. csv-table::
+       :file: ../../tests/_files/plot_data/input_prepare_dispatch_data.csv
+       :header-rows: 1
+
     Parameters
     ---------------
     df : pandas.DataFrame
@@ -330,6 +342,12 @@ def stackplot(ax, df, colors_odict):
     of labels in the colors_odict. It is stacked beginning with the x-axis as
     the bottom.
 
+    The DataFrame `df` is expected to have this form:
+
+    .. csv-table::
+       :file: ../../tests/_files/plot_data/input_prepare_dispatch_data.csv
+       :header-rows: 1
+
     Parameters
     ---------------
     ax : matplotlib.AxesSubplot
@@ -365,6 +383,12 @@ def lineplot(ax, df, colors_odict, linewidth=1):
     r"""
     Plots data as a lineplot.
 
+    The DataFrame `df` is expected to have this form:
+
+    .. csv-table::
+       :file: ../../tests/_files/plot_data/input_prepare_dispatch_data.csv
+       :header-rows: 1
+
     Parameters
     ---------------
     ax : matplotlib.AxesSubplot
@@ -388,6 +412,12 @@ def plot_dispatch(ax, df, df_demand, unit, colors_odict=None, linewidth=1):
     suppliers and other consumers are plotted with a stackplot. Columns with negative vlaues
     are stacked below the x axis and columns with positive values above.
 
+    The DataFrame `df` is expected to have this form:
+
+    .. csv-table::
+       :file: ../../tests/_files/plot_data/input_prepare_dispatch_data.csv
+       :header-rows: 1
+
     Parameters
     ---------------
     ax : matplotlib.AxesSubplot
@@ -454,6 +484,12 @@ def plot_dispatch_plotly(
     Plots data as a dispatch plot in an interactive plotly plot. The demand is plotted as a
     line plot and suppliers and other consumers are plotted with a stackplot.
 
+    The DataFrame `df` is expected to have this form:
+
+    .. csv-table::
+       :file: ../../tests/_files/plot_data/input_prepare_dispatch_data.csv
+       :header-rows: 1
+
     Parameters
     ---------------
     df : pandas.DataFrame
@@ -568,6 +604,12 @@ def plot_grouped_bar(ax, df, color_dict, unit, stacked=False):
     will be interpreted as groups (e.g. regions), the columns as different categories (e.g. energy
     carriers) within the groups which will be plotted in different colors.
 
+    The DataFrame `df` is expected to have this form:
+
+    .. csv-table::
+       :file: ../../tests/_files/plot_data/input_prepare_dispatch_data.csv
+       :header-rows: 1
+
     Parameters
     ----------
     ax: matplotlib Axes object
diff --git a/tests/_files/plot_data/input_prepare_dispatch_data.csv b/tests/_files/plot_data/input_prepare_dispatch_data.csv
new file mode 100644
index 0000000..0eadb69
--- /dev/null
+++ b/tests/_files/plot_data/input_prepare_dispatch_data.csv
@@ -0,0 +1,2 @@
+a,b,c
+1,2,3
\ No newline at end of file