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diff --git a/bin/pychart/scaling.py b/bin/pychart/scaling.py
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+#
+# Copyright (C) 2000-2005 by Yasushi Saito (yasushi.saito@gmail.com)
+#
+# Jockey is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2, or (at your option) any
+# later version.
+#
+# Jockey is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+# for more details.
+#
+import theme
+
+x_base = 300
+y_base = 300
+
+def xscale(x):
+ return x * theme.scale_factor + x_base
+def yscale(y):
+ return y * theme.scale_factor + y_base
+
+def nscale(x):
+ return x * theme.scale_factor
+def nscale_seq(x):
+ return map(nscale, x)
+