| T O P I C R E V I E W |
| berts |
Posted - 05/27/2011 : 11:50:05 AM
Dear All!
I'm trying to use the Geometric SD described here:
http://www.originlab.com/www/helponline/Origin/en/UserGuide/The_DescStats_1_Dialog_Box.html
2 questions:
1. Is the definition right? Wikipedia says that it has to be exp{std(ln x_i)}, not exp{std(log x_i)}
2. How can I plot such SD on the log-log plot to show the error bars equaly big for most of my points (if I use yEr+-, I have huge bars in the low-range and small ones in the high range)
Thanks in adavance!
Elena |
| 1 L A T E S T R E P L I E S (Newest First) |
| berts |
Posted - 05/27/2011 : 11:59:26 AM
Well, the answer to the second question I have just found:
Col(GeoMean)*Col(GeoSD)-Col(GeoMean)
But the first one remains... |
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