From 6c213c3ccff0effbe36b655782a2b6e7b9e6f907 Mon Sep 17 00:00:00 2001
From: Paul Garlick <pgarlick@tourbillion-technology.com>
Date: Fri, 10 Jul 2020 10:02:03 +0100
Subject: python: slope.py: Use cell size in index definition.

* python/slope.py (dzdy): Update note.
---
 python/slope.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/python/slope.py b/python/slope.py
index 29d967e..03839e5 100755
--- a/python/slope.py
+++ b/python/slope.py
@@ -62,8 +62,8 @@ dzdy = np.zeros((NYCELL, NXCELL))
 for i in range(1, NYCELL + 1):
     for j in range(1, NXCELL + 1):
         dzdy[i-1, j-1] = (z3[i+1, j] - z3[i-1, j])/(2.0*DY)
-# array index and co-ordinates are related by:
-#            index = (co-ord - 0.25)*2
+# Note: dz/dy index and co-ordinates are related by:
+#            index = int(co-ord/DX - 0.5)
 #print("dzdy", dzdy[NYCELL-1, 280:301])
 #print("elev", elev[NYCELL-1, 280:301])
 
-- 
cgit