added plot_lineages to plot multiple at once

plotting.py

@@ -105,6 +105,45 @@ def plot_random_time_series(time, values, signalname=None, number=5):
         print(".")
 
 
+def plot_lineages(
+    irange,
+    dl,
+    signals=["volume", "growth_rate"],
+    show=True,
+    figsize=(10, 5),
+    plot_budding_pts=True,
+    shade_times=None,
+    shade_colour="gold",
+):
+    """
+    Wrapper of plot_lineage to plot a range of idx values.
+
+    Parameters
+    ----------
+    irange: list of int
+        Indices of dataloader ids to plot.
+    dl: dataloader instance
+        Contains data to plot.
+
+    Example
+    -------
+    >>> plot_lineages(arange(1,20), dl, ["flavin"])
+    """
+    if isinstance(irange, int):
+        irange = [irange]
+    for i in irange:
+        plot_lineage(
+            dl.ids[i],
+            dl.df,
+            signals,
+            show,
+            figsize,
+            plot_budding_pts,
+            shade_times,
+            shade_colour,
+        )
+
+
 def plot_lineage(
     idx,
     df,