Remove mlab.l1norm

dstansby · dstansby · commit 8f9b0c63cba5 · 2018-09-29T11:05:09.000+01:00
diff --git a/doc/api/next_api_changes/2018-09-18-DS.rst b/doc/api/next_api_changes/2018-09-18-DS.rst
@@ -8,6 +8,7 @@ in Matplotlib 2.2 has been removed. See below for a list:
 - `mlab.amap`
 - `mlab.logspace` (use numpy.logspace instead)
 - `mlab.rms_flat`
+- `mlab.l1norm` (use ``numpy.linalg.norm(a, ord=1)`` instead)
 - `mlab.cohere_pairs` (use scipy.signal.coherence instead)
 - `mlab.entropy` (use scipy.stats.entropy instead)
 - `mlab.normpdf` (use scipy.stats.norm.pdf instead)
diff --git a/lib/matplotlib/mlab.py b/lib/matplotlib/mlab.py
@@ -1246,15 +1246,6 @@ def movavg(x, n):
 
 """
 
-@cbook.deprecated("2.2", alternative='numpy.linalg.norm(a, ord=1)')
-def l1norm(a):
-    """
-    Return the *l1* norm of *a*, flattened out.
-
-    Implemented as a separate function (not a call to :func:`norm` for speed).
-    """
-    return np.sum(np.abs(a))
-
 
 @cbook.deprecated("2.2", alternative='numpy.linalg.norm(a, ord=2)')
 def l2norm(a):
diff --git a/lib/matplotlib/pylab.py b/lib/matplotlib/pylab.py
@@ -232,7 +232,7 @@
     base_repr, binary_repr, csv2rec,
     demean, detrend, detrend_linear, detrend_mean, detrend_none,
     frange,
-    identity, ispower2, isvector, l1norm,
+    identity, ispower2, isvector,
     l2norm, log2, movavg, norm_flat,
     window_hanning, window_none)
 
