From 5718df70d0af2c3ad9fb0e7b47b623f3a6e8f360 Mon Sep 17 00:00:00 2001
From: Richard Wall <richard@the-moon.net>
Date: Thu, 20 Jun 2013 23:59:41 +0100
Subject: choose best si based on total length of y axis - negative to
 positive. Also add a few more step sizes to graphs without any ticks.

---
 jarmon/jarmon.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/jarmon/jarmon.js b/jarmon/jarmon.js
index a7d0adc..4e58334 100644
--- a/jarmon/jarmon.js
+++ b/jarmon/jarmon.js
@@ -649,8 +649,7 @@ jarmon.Chart = function(template, recipe,  downloader) {
         };
         var si = 0;
         while(true) {
-            if( Math.pow(1000, si+1)*0.9 > axis.max
-                && -(Math.pow(1000, si+1))*0.9 < axis.min ) {
+            if( Math.pow(1000, si+1)*0.9 > (axis.max - axis.min) ) {
                 break;
             }
             si++;
@@ -660,7 +659,7 @@ jarmon.Chart = function(template, recipe,  downloader) {
         var maxVal = axis.max/Math.pow(1000, si);
 
         var stepSizes = [0.01, 0.05, 0.1, 0.25, 0.5,
-                         1, 5, 10, 25, 50, 100, 250];
+                         1, 2, 5, 10, 20, 25, 50, 100, 250];
         var realStep = (maxVal - minVal)/5.0;
 
         var stepSize, decimalPlaces = 0;
-- 
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