Remove mlab.segments_intersect

dstansby · dstansby · commit a0b619f2c3fc · 2018-09-29T11:05:06.000+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
@@ -25,4 +25,5 @@ in Matplotlib 2.2 has been removed. See below for a list:
 - `mlab.less_simple_linear_interpolation` (use numpy.interp)
 - `mlab.slopes`
 - `mlab.stineman_interp`
+- `mlab.segments_intersect`
 - `mlab.donothing_callback`
diff --git a/lib/matplotlib/mlab.py b/lib/matplotlib/mlab.py
@@ -1194,33 +1194,6 @@ def cohere(x, y, NFFT=256, Fs=2, detrend=detrend_none, window=window_hanning,
     return Cxy, f
 
 
-@cbook.deprecated('2.2')
-def segments_intersect(s1, s2):
-    """
-    Return *True* if *s1* and *s2* intersect.
-    *s1* and *s2* are defined as::
-
-      s1: (x1, y1), (x2, y2)
-      s2: (x3, y3), (x4, y4)
-    """
-    (x1, y1), (x2, y2) = s1
-    (x3, y3), (x4, y4) = s2
-
-    den = ((y4-y3) * (x2-x1)) - ((x4-x3)*(y2-y1))
-
-    n1 = ((x4-x3) * (y1-y3)) - ((y4-y3)*(x1-x3))
-    n2 = ((x2-x1) * (y1-y3)) - ((y2-y1)*(x1-x3))
-
-    if den == 0:
-        # lines parallel
-        return False
-
-    u1 = n1/den
-    u2 = n2/den
-
-    return 0.0 <= u1 <= 1.0 and 0.0 <= u2 <= 1.0
-
-
 @cbook.deprecated('2.2')
 def fftsurr(x, detrend=detrend_none, window=window_none):
     """
diff --git a/lib/matplotlib/pylab.py b/lib/matplotlib/pylab.py
@@ -237,7 +237,7 @@
     l2norm, log2, movavg, norm_flat,
     path_length, poly_below, poly_between,
     rec2csv, rec_append_fields, rec_drop_fields, rec_join, rms_flat,
-    segments_intersect, vector_lengths,
+    vector_lengths,
     window_hanning, window_none)
 
 from matplotlib import cbook, mlab, pyplot as plt
