scripts: Add eyescan plotting script

Signed-off-by: Alex Forencich <alex@alexforencich.com>

scripts/plot_eye.py

@@ -0,0 +1,82 @@
+#!/usr/bin/env python
+"""
+
+Copyright (c) 2022 Alex Forencich
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+"""
+
+import argparse
+import matplotlib.pyplot as plt
+import numpy as np
+import os
+import pandas as pd
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-i', '--input', type=str, default='', help="input CSV file")
+    parser.add_argument('-d', '--directory', type=str, default='.', help="output directory")
+    parser.add_argument('-o', '--output', type=str, default=None, help="output file")
+    parser.add_argument('-t', '--text', action='store_true', help="add text")
+
+    args = parser.parse_args()
+
+    name = args.output
+    if name is None:
+        name = os.path.basename(os.path.splitext(args.input)[0])
+
+    df = pd.read_csv(args.input, comment="#")
+
+    h_offsets = df['h_offset'].unique()
+    v_offsets = df['v_offset'].unique()
+
+    df['ber'] = df['error_count'] / df['bit_count']
+
+    df2 = df.groupby(['h_offset', 'v_offset'], as_index=False)['ber'].sum()
+
+    print(df2)
+
+    ber = df2.pivot_table(index='v_offset', columns='h_offset', values='ber').values
+
+    print(ber)
+
+    ber_l10 = np.log10(ber)
+
+    ber_hm = ber_l10
+    ber_hm[ber_hm == -np.inf] = -10
+
+    f, ax = plt.subplots(1, figsize=(10, 8))
+
+    im = ax.imshow(np.flipud(ber_hm), cmap='plasma', interpolation='nearest',
+        extent=[min(h_offsets), max(h_offsets), min(v_offsets), max(v_offsets)], aspect="auto")
+
+    cbar = ax.figure.colorbar(im, ax=ax)
+    cbar.ax.set_ylabel("$\\log_{10}(BER)$", rotation=-90, va="bottom")
+
+    ax.set_title("BER")
+    ax.set_xlabel("Horizontal offset")
+    ax.set_ylabel("Vertical offset")
+
+    f.savefig(args.directory+'/'+name+'.png')
+
+
+if __name__ == '__main__':
+    main()