From 34479fa8c85f0082fa84ebafec85022aff9542f3 Mon Sep 17 00:00:00 2001
From: Hendrik Schawe <hendrik.schawe@uni-oldenburg.de>
Date: Fri, 8 Jun 2018 12:09:08 +0200
Subject: [PATCH] Do not use unecessarily many datapoints

The precision argument is not applicable to constant interpolation,
since it consists of straight lines.
---
 pygal/interpolate.py | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/pygal/interpolate.py b/pygal/interpolate.py
index 37b57cc..eddcacf 100644
--- a/pygal/interpolate.py
+++ b/pygal/interpolate.py
@@ -230,7 +230,7 @@ def trigonometric_interpolate(x, y, precision=250, **kwargs):
             yield X, s
 
 
-def constant_interpolate(x, y, precision=250, **kwargs):
+def constant_interpolate(x, y, **kwargs):
     n = len(x) - 1
     delta_x = [x2 - x1 for x1, x2 in zip(x, x[1:])]
     for i in range(n + 1):
@@ -238,9 +238,8 @@ def constant_interpolate(x, y, precision=250, **kwargs):
         if i == n or delta_x[i] == 0:
             continue
 
-        for s in range(1, precision):
-            X = x[i] + s * delta_x[i] / precision
-            yield X, y[i]
+        X = x[i] + delta_x[i]
+        yield X, y[i]
 
 
 INTERPOLATIONS = {