fixing plot_spectrum (#429)

* fixing mpl deprecations for version 3.8
* preparation for release 0.11.3

Author: JoschD

CHANGELOG.md

@@ -1,5 +1,12 @@
 # OMC3 Changelog
 
+#### 2023-09-20 - v0.11.3 - _jdilly_, _awegsche_
+
+- Fixed:
+  - compatibility with matplotlib 3.8
+  - skipping important phase advances for HL-LHC (as not defined yet)
+  - allowing responses with delta_k < 1e-6 for full-response creation
+
 #### 2023-09-01 - v0.11.2 - _jdilly_
 
 - Fixed:

omc3/__init__.py

@@ -11,7 +11,7 @@
 __title__ = "omc3"
 __description__ = "An accelerator physics tools package for the OMC team at CERN."
 __url__ = "https://github.com/pylhc/omc3"
-__version__ = "0.11.2"
+__version__ = "0.11.3"
 __author__ = "pylhc"
 __author_email__ = "[email protected]"
 __license__ = "MIT"

omc3/plotting/plot_tfs.py

@@ -509,7 +509,13 @@ def _share_xaxis(fig_collection):
     """Shared xaxis at last axes and remove all xlabels, ticks of other axes."""
     for fig_container in fig_collection.figs.values():
         axs = fig_container.axes.values()
-        fig_container.axes[fig_container.axes_ids[-1]].get_shared_x_axes().join(*axs)
+
+        # Axes.get_shared_x_axes() does not work here as it returns a GrouperView
+        # instead of the Grouper (i.e. _shared_axes['x'], matplotlib < 3.8), 
+        # so we access _shared_axes directly
+        fig_container.axes[fig_container.axes_ids[-1]]._shared_axes["x"].join(*axs)
+
+        # remove ticks and labels for all but the last axes.
         for ax_id in fig_container.axes_ids[:-1]:
             fig_container.axes[ax_id].set_xticklabels([])
             fig_container.xlabels[ax_id] = None

omc3/plotting/spectrum/stem.py

@@ -44,8 +44,13 @@ def _plot_stems(fig_cont: FigureContainer) -> None:
             if data[plane] is None:
                 continue
             # plot
-            markers, stems, base = ax.stem(data[plane][FREQS], data[plane][AMPS],
-                                           use_line_collection=True, basefmt='none', label=label)
+            try:
+                # Matplotlib < v3.8
+                markers, stems, base = ax.stem(data[plane][FREQS], data[plane][AMPS], basefmt='none', label=label,
+                                               use_line_collection=True)
+            except TypeError:
+                # Matplotlib >= v3.8
+                markers, stems, base = ax.stem(data[plane][FREQS], data[plane][AMPS], basefmt='none', label=label)
 
             # Set appropriate colors
             color = get_cycled_color(idx_data)