[Eeglablist] Averaging conditions in STUDY vs Command Line

[Nikola Vukovic]

Dear list,

Until now, I assumed that selecting several conditions and combining them
into one condition (using the "combine selected values" in STUDY design
window) simply averages the given conditions. Once I got more comfortable
with command line scripting, I started averaging them manually (by plotting
the conditions separately, then averaging their ersp data output. For
example ersp_avg = (ersp{1,1} + ersp{2,1})/2). However, I find that the
outputs I get when manually averaging, and when averaging variables in
STUDY design are completely different (compare
http://cl.ly/image/0E010I0g1x21 and http://cl.ly/image/3O01242E0b0M).
Where does this difference come from? What exactly does the "combine
selected values" function do?

Thank you,
Nikola
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