[Eeglablist] 回复:Re: How to get same time points of different epoch in the function newtimef?

methodlearning at sina.cn methodlearning at sina.cn
Tue Mar 31 02:40:57 PDT 2015

Hi Makoto,Thanks a lot for your reply!If I use the function newtimef to decompose epochs of different
conditions and give input parameter "timesout" the same value, the
time points output after 0 ms will be very different across conditions because
the time spans were different .For example,
if I decompose different epochs using the same function newtimef(EEG.data(elec,:,:)EEG.pnts,[EEG.xmin
EEG.xmax]*1000,500,’cycles’,[2 0.5],'baseline',BaselineVector,'timesout',250,'nfreqs',93,'winsize',250),the
time points output after 0 ms for condition A will be :[6 14 20 26 34 40 46 52
60 66 72 80 86 92...];and condition B :[4 12 22 30 38 46 54 62 72
80 ...];and condition C:[4 10 16 22 28 34 40
46...].However, I need to compare ersp value across conditions on the same
time points using ANOVA after decomposing. The decomposing results of condition
A mentioned above included the ersp data at the time point"6", and
results of condition B and C didn't include the time point"6",so we
can't do ANOAV. And I am not interested in the ersp value before 0 ms . So I need to know how to get ersp value on one-one corresponding time
points after 0 ms across conditions of different epoch span.Maybe I need to know newtimef algorithm
of determining time points output ,to adjust the input parameter
"timesout", to get ersp value on one-one corresponding time points
across conditions(after 0 ms) .I am not sure if I made myself clear now?Thank you again for your help!

                                                                                                                                                        I.P.----- 原始邮件 -----
发件人:Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
收件人:methodlearning at sina.cn
抄送人:eeglablist <eeglablist at sccn.ucsd.edu>
主题:Re: [Eeglablist] How to get same time points of different epoch in the function newtimef?
日期:2015年03月31日 03点40分

Dear I.P.,
I need more info (data) to answer to your question. What do you mean by 'so different'?
On Sat, Mar 28, 2015 at 10:34 PM,  <methodlearning at sina.cn> wrote:
Hi all,      In the time-frequency analysis,the epoch methods of different conditions were different:The epoch of condition A was [-1400 800]ms,and the baseline was [-1300 -1000]ms;The epoch of condition B was [-1832 800]ms ,and the baseline was[-1732 -1432]ms;The epoch of condition C was [-1220 800]ms ,and the baseline was[-1120 -820]ms;   I am not interested in the  decomposition results before 0 ms,but I need to compare above conditions on the time points after 0 ms.I did this using the function newtimef,but the output time points of conditions were so different that I can't compare these conditions .How can I get same time points after 0 ms of different epoch?Thank you ! I am very appreciated your answers!                                                                                                                              I.P.

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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego

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