plot to create a star plot

ibllib/oneibl/registration.py

@@ -13,7 +13,10 @@
 from one.converters import ConversionMixin
 import one.alf.exceptions as alferr
 from one.api import ONE
-from one.util import datasets2records
+try:
+    from one.util import datasets2records
+except ImportError:
+    from one.converters import datasets2records
 from iblutil.util import ensure_list
 
 import ibllib

ibllib/plots/misc.py

@@ -1,5 +1,7 @@
 #!/usr/bin/env python
 # -*- coding:utf-8 -*-
+from math import pi
+
 import numpy as np
 import matplotlib.pyplot as plt
 import scipy
@@ -274,7 +276,53 @@ def color_cycle(ind=None):
         return tuple(c[ind % c.shape[0], :])
 
 
-if __name__ == "__main__":
-    w = np.random.rand(500, 40) - 0.5
-    wiggle(w, fs=30000)
-    Traces(w, fs=30000, color='r')
+def starplot(labels, radii, ticks=None, ax=None, ylim=None, color=None, title=None):
+    """
+    Function to create a star plot (also known as a spider plot, polar plot, or radar chart).
+
+    Parameters:
+    labels (list): A list of labels for the variables to be plotted along the axes.
+    radii (numpy array): The values to be plotted for each variable.
+    ticks (numpy array, optional): A list of values to be used for the radial ticks.
+                                 If None, 5 ticks will be created between the minimum and maximum values of radii.
+    ax (matplotlib.axes._subplots.PolarAxesSubplot, optional): A polar axis object to plot on.
+                                                             If None, a new figure and axis will be created.
+    ylim (tuple, optional): A tuple specifying the upper and lower limits of the y-axis.
+                            If None, the limits will be set to the minimum and maximum values of radii.
+    color (str, optional): A string specifying the color of the plot.
+                          If None, the color will be determined by the current matplotlib color cycle.
+    title (str, optional): A string specifying the title of the plot.
+                           If None, no title will be displayed.
+
+    Returns:
+    ax (matplotlib.axes._subplots.PolarAxesSubplot): The polar axis object containing the plot.
+    """
+
+    # What will be the angle of each axis in the plot? (we divide the plot / number of variable)
+    angles = [n / float(radii.size) * 2 * pi for n in range(radii.size)]
+    angles += angles[:1]
+
+    if ax is None:
+        # Initialise the spider plot
+        fig = plt.figure(figsize=(8, 8))
+        ax = fig.add_subplot(111, polar=True)
+        # If you want the first axis to be on top:
+        ax.set_theta_offset(pi / 2)
+        ax.set_theta_direction(-1)
+        # Draw one axe per variable + add labels
+        plt.xticks(angles[:-1], labels)
+        # Draw ylabels
+        ax.set_rlabel_position(0)
+        if ylim is None:
+            ylim = (0, np.max(radii))
+        if ticks is None:
+            ticks = np.linspace(ylim[0], ylim[1], 5)
+        plt.yticks(ticks, [f'{t:2.2f}' for t in ticks], color="grey", size=7)
+        plt.ylim(ylim)
+
+    r = np.r_[radii, radii[0]]
+    p = ax.plot(angles, r, linewidth=1, linestyle='solid', label="group A", color=color)
+    ax.fill(angles, r, alpha=0.1, color=p[0].get_color())
+    if title is not None:
+        ax.set_title(title)
+    return ax

ibllib/tests/test_plots.py

@@ -1,19 +1,23 @@
-import unittest
+from pathlib import Path
 import tempfile
+import unittest
 import uuid
 
-from pathlib import Path
+import matplotlib.pyplot as plt
+import numpy as np
 from PIL import Image
 from urllib.parse import urlparse
 
 from one.api import ONE
 from one.webclient import http_download_file
 
+import ibllib.plots.misc
 from ibllib.tests import TEST_DB
 from ibllib.tests.fixtures.utils import register_new_session
 from ibllib.plots.snapshot import Snapshot
 from ibllib.plots.figures import dlc_qc_plot
 
+
 WIDTH, HEIGHT = 1000, 100
 
 
@@ -163,3 +167,19 @@ def test_without_inputs(self):
         # fig.savefig(fig_path)
         # with Image.open(fig_path) as im:
         #     self.assertEqual(im.size, (1700, 1000))
+
+
+class TestMiscPlot(unittest.TestCase):
+
+    def test_star_plot(self):
+        r = np.random.rand(6)
+        ax = ibllib.plots.misc.starplot(['a', 'b', 'c', 'd', 'e', 'f'], r, ylim=[0, 1])
+        r = np.random.rand(6)
+        ibllib.plots.misc.starplot(['a', 'b', 'c', 'd', 'e', 'f'], r, ax=ax, color='r')
+        plt.close('all')
+
+    def test_wiggle(self):
+        w = np.random.rand(500, 40) - 0.5
+        ibllib.plots.misc.wiggle(w, fs=30000)
+        ibllib.plots.misc.Traces(w, fs=30000, color='r')
+        plt.close('all')