From 54613c1f9cf510ca7a71d6619418f2247515aec6 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex.auvolat@ens.fr>
Date: Tue, 5 May 2015 14:15:21 -0400
Subject: Add models for time predictioAdd models for time prediction

---
 hdist.py | 37 -------------------------------------
 1 file changed, 37 deletions(-)
 delete mode 100644 hdist.py

(limited to 'hdist.py')

diff --git a/hdist.py b/hdist.py
deleted file mode 100644
index 866aea4..0000000
--- a/hdist.py
+++ /dev/null
@@ -1,37 +0,0 @@
-from theano import tensor
-import theano
-import numpy
-
-def const(v):
-    if theano.config.floatX == 'float32':
-        return numpy.float32(v)
-    else:
-        return numpy.float64(v)
-
-rearth = const(6371)
-deg2rad = const(3.141592653589793 / 180)
-
-def hdist(a, b):
-    lat1 = a[:, 0] * deg2rad
-    lon1 = a[:, 1] * deg2rad
-    lat2 = b[:, 0] * deg2rad
-    lon2 = b[:, 1] * deg2rad
-
-    dlat = abs(lat1-lat2)
-    dlon = abs(lon1-lon2)
-
-    al = tensor.sin(dlat/2)**2  + tensor.cos(lat1) * tensor.cos(lat2) * (tensor.sin(dlon/2)**2)
-    d = tensor.arctan2(tensor.sqrt(al), tensor.sqrt(const(1)-al))
-
-    hd = const(2) * rearth * d
-
-    return tensor.switch(tensor.eq(hd, float('nan')), (a-b).norm(2, axis=1), hd)
-
-def erdist(a, b):
-    lat1 = a[:, 0] * deg2rad
-    lon1 = a[:, 1] * deg2rad
-    lat2 = b[:, 0] * deg2rad
-    lon2 = b[:, 1] * deg2rad
-    x = (lon2-lon1) * tensor.cos((lat1+lat2)/2)
-    y = (lat2-lat1)
-    return tensor.sqrt(tensor.sqr(x) + tensor.sqr(y)) * rearth
-- 
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