From d98b75b9357a6e91eda9e7d16f0368f06aca8bbd Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Sun, 6 Apr 2008 16:54:15 -0400
Subject: [PATCH] Deal gracefully with empty plots.

---
 bin/logtool | 2 +-
 src/log.py  | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/bin/logtool b/bin/logtool
index 5734bfc..721b057 100755
--- a/bin/logtool
+++ b/bin/logtool
@@ -66,7 +66,7 @@ following:
     styles = [
             Record(dashes=dashes, color=color)
             for dashes, color in cartesian_product(
-                [(), (12, 2), (4, 2),  (2,2) ],
+                [(), (12, 2), (4, 2),  (2,2), (2,8) ],
                 ["blue", "green", "red", "magenta", "cyan"],
                 )]
 
diff --git a/src/log.py b/src/log.py
index 8f30bc2..ea2492e 100644
--- a/src/log.py
+++ b/src/log.py
@@ -559,7 +559,12 @@ class LogManager(object):
 
         stepless_data = [tup for step, tup in data]
 
-        data_x, data_y = zip(*stepless_data)
+        if stepless_data:
+            data_x, data_y = zip(*stepless_data)
+        else:
+            data_x = []
+            data_y = []
+
         return (data_x, descr_x, unit_x), \
                (data_y, descr_y, unit_y)
 
-- 
GitLab