Contents
errorbarlog
Symmetrical error bars for logarithmic Y-axis.

Description
errorbarlog(X,Y,E,...) plots the graph of vector X vs. vector Y with 
a logarithmic Y-axis, using symmetrical bars about the data points, ie: 
the bars are such that Y is the geometric mean (instead of arithmetic 
mean) of the lower and upper bars. The total length of the error bar is 
2E. 
 
errorbarlog has the same syntax as the original Matlab's ERRORBAR 
function. The only difference is that while ERRORBAR displays the bars 
symmetrically for a linear Y-axis (ie: Y is the arithmetic mean of 
the lower and upper bars), errorbarlog displays them symmetrically 
for a logarithmic Y-axis. 
 
Example: 
   x=logspace(1,3,20); 
   y=5*(1 + 0.5*(rand(1,20)-0.5)).*x.^(-2); 
   errorbarlog(x,y,y/2,'o-'); 
 
F. Moisy 
Revision: 1.01,  Date: 2006/09/08 
 
See Also
ERRORBAR. 

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