correct subscripts

Zabamund · Aug 19, 2019 · 5f2187b · 5f2187b
1 parent 36182d0
commit 5f2187b
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/wellpathpy/tan.py b/wellpathpy/tan.py
@@ -228,13 +228,13 @@ def balanced_tan(md, inc, azi):
     Formulae:
 
     .. math::
-        northing = \sum \\frac{(md_lower - md_upper) \cdot ((sin(inc_upper) \cdot cos(azi_upper) + sin(inc_lower) \cdot cos(azi_lower))}{2}
+        northing = \sum \\frac{(md_l - md_u) \cdot ((sin(inc_u) \cdot cos(azi_u) + sin(inc_l) \cdot cos(azi_l))}{2}
 
     .. math::
-        easting = \sum (md_lower - md_upper) \cdot ((sin(inc_upper) \cdot sin(azi_upper) + sin(inc_lower) \cdot sin(azi_lower)) / 2)
+        easting = \sum (md_l - md_u) \cdot ((sin(inc_u) \cdot sin(azi_u) + sin(inc_l) \cdot sin(azi_l)) / 2)
 
     .. math::
-        tvd = \sum (md_lower - md_upper) \cdot (cos(inc_lower) + cos(inc_upper)) / 2)
+        tvd = \sum (md_l - md_u) \cdot (cos(inc_l) + cos(inc_u)) / 2)
 
     where: