If no input or given I2 matrix, no need to plot input and output sepa…

…rately

plotvec/__init__.py

@@ -10,7 +10,7 @@
 All files in the package are distributed under the MIT License
 '''
 
-__version__ = '1.7.1'
+__version__ = '1.7.2'
 
 from .plotvec import plotvec, plotvecR
 from .transforms import transform_unit_vecs, transform_field 

plotvec/transforms.py

@@ -60,7 +60,7 @@ def transform_unit_vecs(matrix, num_vectors=16, colormap='plasma', show_input_ve
   plt.ylim(-4,4);
   plt.hlines(0,-4,4, 'k', linewidth=0.5)
   if show_input_vecs:
-    plt.title('Output vectors when unit vectors\nare left-multiplied by matrix')
+    plt.title('vectors Output when unit vectors\nare left-multiplied by matrix')
 
   plt.tight_layout()
 
@@ -99,6 +99,10 @@ def transform_field (matrix=np.eye(2), field_width=3, point_spacing=0.5,
 
   assert matrix.shape == (2,2), "matrix argument must be a 2x2 array"
 
+  # No need to output 2 graphs of same thing
+  if np.all( matrix == np.eye(2) ):
+    show_input_vecs=False
+
   cmap = mpl.colormaps[colormap]
 
   xs = np.arange(-field_width, field_width + point_spacing,