fixed 2 scaling bugs in scopesink

[debian/gnuradio] / gr-wxgui / src / python / common.py

diff --git a/gr-wxgui/src/python/common.py b/gr-wxgui/src/python/common.py
index f31e1a7085aac9983889668c2c8a72496815f464..e7d08891d36b9e1224bd6d9fc0f100d8f05c4c53 100644 (file)
--- a/gr-wxgui/src/python/common.py
+++ b/gr-wxgui/src/python/common.py
@@ -259,7 +259,7 @@ def get_min_max(samples):
        """
        scale_factor = 3
        mean = numpy.average(samples)
-       rms = scale_factor*((numpy.sum((samples-mean)**2)/len(samples))**.5)
+       rms = numpy.max([scale_factor*((numpy.sum((samples-mean)**2)/len(samples))**.5), .1])
        min = mean - rms
        max = mean + rms
        return min, max