diff --git a/jetpack/chart/plots.py b/jetpack/chart/plots.py
index cc5a111..cdfa2b7 100644
--- a/jetpack/chart/plots.py
+++ b/jetpack/chart/plots.py
@@ -105,7 +105,7 @@ def errorplot(x, y, yerr, method='patch', color='k', xscale='linear', fmt='-',
 
 
 @plotwrapper
-def img(data, mode='div', center=True, cmap=None, aspect='equal', vmin=None, vmax=None, cbar=False, **kwargs):
+def img(data, mode='div', center=True, cmap=None, aspect='equal', vmin=None, vmax=None, cbar=False, interpolation='none', **kwargs):
     """
     Visualize a matrix as an image
 
@@ -165,7 +165,7 @@ def img(data, mode='div', center=True, cmap=None, aspect='equal', vmin=None, vma
         raise ValueError("Unrecognized mode: '" + mode + "'")
 
     # make the image
-    kwargs['ax'].imshow(img, cmap=cmap, interpolation=None,
+    kwargs['ax'].imshow(img, cmap=cmap, interpolation=interpolation,
                         vmin=vmin, vmax=vmax, aspect=aspect)
 
     # colorbar
@@ -240,5 +240,11 @@ def corrplot(C, cmap=None, cmap_range=(0.0, 1.0), cbar=True, fontsize=14, **kwar
     noticks(ax=ax)
 
 
+@plotwrapper
+def bars(*dicts, **kwargs):
+    ax = kwargs['ax']
+    raise NotImplementedError
+
+
 # aliases
 imv = partial(img, mode='seq')
diff --git a/jetpack/chart/utils.py b/jetpack/chart/utils.py
index 571ea26..b8af54f 100644
--- a/jetpack/chart/utils.py
+++ b/jetpack/chart/utils.py
@@ -5,7 +5,7 @@
 import matplotlib.pyplot as plt
 from functools import wraps
 
-__all__ = ['setfontsize', 'noticks', 'nospines', 'breathe']
+__all__ = ['setfontsize', 'noticks', 'nospines', 'breathe', 'setcolor']
 
 
 def plotwrapper(fun):
@@ -71,6 +71,8 @@ def setfontsize(size=18, **kwargs):
     ax.set_xticklabels(ax.get_xticks(), fontsize=size)
     ax.set_yticklabels(ax.get_yticks(), fontsize=size)
 
+    return ax
+
 
 @axwrapper
 def noticks(**kwargs):
@@ -99,6 +101,8 @@ def nospines(**kwargs):
     ax.yaxis.set_ticks_position('left')
     ax.xaxis.set_ticks_position('bottom')
 
+    return ax
+
 
 @axwrapper
 def breathe(factor=0.05, **kwargs):
@@ -123,3 +127,22 @@ def breathe(factor=0.05, **kwargs):
     ax.spines['left'].set_bounds(ya, yb)
 
     nospines(**kwargs)
+
+    return ax
+
+
+@axwrapper
+def setcolor(color='#444444', **kwargs):
+    ax = kwargs['ax']
+
+    # set the tick parameters
+    ax.tick_params(axis='x', colors=color)
+    ax.tick_params(axis='y', colors=color)
+
+    # set the label colors
+    ax.xaxis.label.set_color(color)
+    ax.yaxis.label.set_color(color)
+    ax.set_xlabel(ax.get_xlabel(), color=color)
+    ax.set_ylabel(ax.get_ylabel(), color=color)
+
+    return ax
diff --git a/jetpack/signals.py b/jetpack/signals.py
index d5f8ae4..3f81b26 100644
--- a/jetpack/signals.py
+++ b/jetpack/signals.py
@@ -12,7 +12,7 @@
 from scipy.linalg import sqrtm, inv
 
 __all__ = ['peakdet', 'smooth', 'norms', 'sfthr', 'sfrct', 'sq', 'arr',
-           'whiten', 'canoncorr', 'xcorr']
+           'whiten', 'canoncorr', 'xcorr', 'sqa']
 
 
 def peakdet(v, delta, x=None):
@@ -299,3 +299,8 @@ def arr(x):
     Converts a generator to a numpy array
     """
     return np.array(list(x))
+
+
+def sqa(x):
+    """Squeeze(array)"""
+    return np.squeeze(np.array(x))