Added error catching during plotting, if some type of gaze event has …

…not been detected at all

plotters.py

@@ -39,50 +39,55 @@ def detection(x, y, t, v, fixations, saccades, pursuits, blinks, trials, trial,
 
 def calculation(fixations, saccades, pursuits, blinks, trial, participant):
     plt.figure(trial + 1, figsize=[25.60, 14.40])
-    plt.subplot(4, 4, 1)
-    histogramreighley(fixations[:, 2])
-    plt.title("Fixation duration")
-    plt.xlabel('Time [s]')
-
-    plt.subplot(4, 4, 5)
-    histogramreighley(saccades[:, 2])
-    plt.title("Saccade duration")
-    plt.xlabel('Time [s]')
-    plt.subplot(4, 4, 6)
-    histogramreighley(saccades[:, 7])
-    plt.title("Saccade amplitude")
-    plt.xlabel('Amplitude [deg]')
-    plt.subplot(4, 4, 7)
-    histogramreighley(saccades[:, 8])
-    plt.title("Saccade mean velocity")
-    plt.xlabel('Velocity [deg/s]')
-    plt.subplot(4, 4, 8)
-    histogramreighley(saccades[:, 9])
-    plt.title("Saccade max velocity")
-    plt.xlabel('Velocity [deg/s]')
-
-    plt.subplot(4, 4, 9)
-    histogramreighley(pursuits[:, 2])
-    plt.title("Pursuit duration")
-    plt.xlabel('Time [s]')
-    plt.subplot(4, 4, 10)
-    histogramreighley(pursuits[:, 7])
-    plt.title("Pursuit amplitude")
-    plt.xlabel('Amplitude [deg]')
-    plt.subplot(4, 4, 11)
-    plt.xlabel('Amplitude [deg]')
-    histogramreighley(pursuits[:, 8])
-    plt.title("Pursuit mean velocity")
-    plt.xlabel('Velocity [deg/s]')
-    plt.subplot(4, 4, 12)
-    histogramreighley(pursuits[:, 9])
-    plt.title("Pursuit max velocity")
-    plt.xlabel('Velocity [deg/s]')
-
-    plt.subplot(4, 4, 13)
-    histogramreighley(blinks[:, 2])
-    plt.title("Blink duration")
-    plt.xlabel('Time [s]')
+
+    if fixations.any():
+        plt.subplot(4, 4, 1)
+        histogramreighley(fixations[:, 2])
+        plt.title("Fixation duration")
+        plt.xlabel('Time [s]')
+
+    if saccades.any():
+        plt.subplot(4, 4, 5)
+        histogramreighley(saccades[:, 2])
+        plt.title("Saccade duration")
+        plt.xlabel('Time [s]')
+        plt.subplot(4, 4, 6)
+        histogramreighley(saccades[:, 7])
+        plt.title("Saccade amplitude")
+        plt.xlabel('Amplitude [deg]')
+        plt.subplot(4, 4, 7)
+        histogramreighley(saccades[:, 8])
+        plt.title("Saccade mean velocity")
+        plt.xlabel('Velocity [deg/s]')
+        plt.subplot(4, 4, 8)
+        histogramreighley(saccades[:, 9])
+        plt.title("Saccade max velocity")
+        plt.xlabel('Velocity [deg/s]')
+
+    if pursuits.any():
+        plt.subplot(4, 4, 9)
+        histogramreighley(pursuits[:, 2])
+        plt.title("Pursuit duration")
+        plt.xlabel('Time [s]')
+        plt.subplot(4, 4, 10)
+        histogramreighley(pursuits[:, 7])
+        plt.title("Pursuit amplitude")
+        plt.xlabel('Amplitude [deg]')
+        plt.subplot(4, 4, 11)
+        plt.xlabel('Amplitude [deg]')
+        histogramreighley(pursuits[:, 8])
+        plt.title("Pursuit mean velocity")
+        plt.xlabel('Velocity [deg/s]')
+        plt.subplot(4, 4, 12)
+        histogramreighley(pursuits[:, 9])
+        plt.title("Pursuit max velocity")
+        plt.xlabel('Velocity [deg/s]')
+
+    if blinks.any():
+        plt.subplot(4, 4, 13)
+        histogramreighley(blinks[:, 2])
+        plt.title("Blink duration")
+        plt.xlabel('Time [s]')
 
     plt.tight_layout()