From d02453447b5466a6009d5180c68a76d14e0f27d4 Mon Sep 17 00:00:00 2001
From: craig-warren <craig_warren@me.com>
Date: Thu, 26 Nov 2015 17:53:15 +0000
Subject: [PATCH] Updated to accept optional argument of fields to plot, e.g.
 Ez Hx Hy

---
 tools/plot_Ascan.py | 66 ++++++++++++++++++++++++++++++++-------------
 1 file changed, 47 insertions(+), 19 deletions(-)

diff --git a/tools/plot_Ascan.py b/tools/plot_Ascan.py
index 434b4b33..c6729fcb 100644
--- a/tools/plot_Ascan.py
+++ b/tools/plot_Ascan.py
@@ -21,11 +21,17 @@ import h5py
 import numpy as np
 import matplotlib.pyplot as plt
 
+from gprMax.exceptions import CmdInputError
+
 """Plots electric and magnetic fields from all receiver points in the given output file. Each receiver point is plotted in a new figure window."""
 
+# Fields that can be plotted
+fieldslist = ['Ex', 'Ey', 'Ez', 'Hx', 'Hy', 'Hz']
+
 # Parse command line arguments
 parser = argparse.ArgumentParser(description='Plots electric and magnetic fields from all receiver points in the given output file. Each receiver point is plotted in a new figure window.', usage='cd gprMax; python -m tools.plot_Ascan outputfile')
 parser.add_argument('outputfile', help='name of output file including path')
+parser.add_argument('--fields', help="list of fields to be plotted, i.e. ['Ex', 'Ey', 'Ez']", default=fieldslist, nargs='+')
 args = parser.parse_args()
 
 file = args.outputfile
@@ -34,29 +40,51 @@ nrx = f.attrs['nrx']
 time = np.arange(0, f.attrs['dt'] * f.attrs['Iterations'], f.attrs['dt'])
 time = time / 1e-9
 
+# Check for valid field names
+for field in args.fields:
+    if field not in fieldslist:
+        raise CmdInputError('{} not allowed. Options are: Ex, Ey, Ez, Hx, Hy, Hz'.format(field))
+
 for rx in range(1, nrx + 1):
     path = '/rxs/rx' + str(rx) + '/'
-    Ex = f[path + 'Ex'][:]
-    Ey = f[path + 'Ey'][:]
-    Ez = f[path + 'Ez'][:]
-    Hx = f[path + 'Hx'][:]
-    Hy = f[path + 'Hy'][:]
-    Hz = f[path + 'Hz'][:]
     
-    fig, ((ax1, ax2), (ax3, ax4), (ax5, ax6)) = plt.subplots(nrows=3, ncols=2, sharex=False, sharey='col', subplot_kw=dict(xlabel='Time [ns]'), num='rx' + str(rx), figsize=(20, 10), facecolor='w', edgecolor='w')
-    ax1.plot(time, Ex,'r', lw=2, label='Ex')
-    ax3.plot(time, Ey,'r', lw=2, label='Ey')
-    ax5.plot(time, Ez,'r', lw=2, label='Ez')
-    ax2.plot(time, Hx,'b', lw=2, label='Hx')
-    ax4.plot(time, Hy,'b', lw=2, label='Hy')
-    ax6.plot(time, Hz,'b', lw=2, label='Hz')
+    # If only a single field is required, create one subplot
+    if len(args.fields) == 1:
+        fielddata = f[path + args.fields[0]][:]
+        if 'E' in args.fields[0]:
+            fig, ax = plt.subplots(subplot_kw=dict(xlabel='Time [ns]', ylabel=args.fields[0] + ', field strength [V/m]'), num='rx' + str(rx), figsize=(20, 10), facecolor='w', edgecolor='w')
+            ax.plot(time, fielddata,'r', lw=2, label=args.fields[0])
+            ax.grid()
+        elif 'H' in args.fields[0]:
+            fig, ax = plt.subplots(subplot_kw=dict(xlabel='Time [ns]', ylabel=args.fields[0] + ', field strength [A/m]'), num='rx' + str(rx), figsize=(20, 10), facecolor='w', edgecolor='w')
+            ax.plot(time, fielddata,'b', lw=2, label=args.fields[0])
+            ax.grid()
 
-    # Set ylabels
-    ylabels = ['$E_x$, field strength [V/m]', '$H_x$, field strength [A/m]', '$E_y$, field strength [V/m]', '$H_y$, field strength [A/m]', '$E_z$, field strength [V/m]', '$H_z$, field strength [A/m]']
-    [ax.set_ylabel(ylabels[index]) for index, ax in enumerate(fig.axes)]
-
-    # Turn on grid
-    [ax.grid() for ax in fig.axes]
+    # If multiple fields are required, created all six subplots and populate only the specified ones
+    else:
+        fig, ((ax1, ax2), (ax3, ax4), (ax5, ax6)) = plt.subplots(nrows=3, ncols=2, sharex=False, sharey='col', subplot_kw=dict(xlabel='Time [ns]'), num='rx' + str(rx), figsize=(20, 10), facecolor='w', edgecolor='w')
+        for field in args.fields:
+            fielddata = f[path + field][:]
+            if field == 'Ex':
+                ax1.plot(time, fielddata,'r', lw=2, label=field)
+                ax1.set_ylabel('$E_x$, field strength [V/m]')
+            elif field == 'Ey':
+                ax3.plot(time, fielddata,'r', lw=2, label=field)
+                ax3.set_ylabel('$E_y$, field strength [V/m]')
+            elif field == 'Ez':
+                ax5.plot(time, fielddata,'r', lw=2, label=field)
+                ax5.set_ylabel('$E_z$, field strength [V/m]')
+            elif field == 'Hx':
+                ax2.plot(time, fielddata,'b', lw=2, label=field)
+                ax2.set_ylabel('$H_x$, field strength [A/m]')
+            elif field == 'Hy':
+                ax4.plot(time, fielddata,'b', lw=2, label=field)
+                ax4.set_ylabel('$H_y$, field strength [A/m]')
+            elif field == 'Hz':
+                ax6.plot(time, fielddata,'b', lw=2, label=field)
+                ax6.set_ylabel('$H_z$, field strength [A/m]')
+        # Turn on grid
+        [ax.grid() for ax in fig.axes]
 
     # Save a PDF of the figure
     #fig.savefig(os.path.splitext(os.path.abspath(file))[0] + '.pdf', dpi=None, format='pdf', bbox_inches='tight', pad_inches=0.1)