<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi Payashi,<div>I’m forwarding your message to the list again.<br><div><blockquote type="cite"><br><div>
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Dear Tzvetan,
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<div>Thank you, that works perfectly. Many apologies, this is the last question. Is it possible to topographically represent the change in alpha/delta ratio (i.e. one epoch in time from another) ? I have calculated this by selecting two epochs of time from
my 'ADR' matrix and subtracting them. However, I get the following error message when I put this into topoplot ER</div></div></div></blockquote><div><br></div>I suspect you should check whether you did the subtraction properly. Regarding to this you should check the functionality of ft_selectdata (select the epochs) and ft_math(subtract them). I suggest you try these first and see whether the input to ft_topoplotER is properly organized.</div><div>best</div><div>tzvetan</div><div> <br><blockquote type="cite"><div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
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<div>Index exceeds matrix dimensions.</div>
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<div>Error in topoplot_common (line 556)</div>
<div> dat = dat(sellab, xmin:xmax);</div>
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<div>Error in ft_topoplotER (line 192)</div>
<div>cfg = topoplot_common(cfg, varargin{:});</div>
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<div>Many thanks</div>
<div>Payashi</div>
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<div>****<br>
Dr Payashi Garry MB BChir FRCA<br>
Specialty Registrar in Anaesthetics and BRC Research Fellow<br>
Nuffield Department of Clinical Neurosciences<br>
John Radcliffe Hospital<br>
Oxford OX3 9DU<br>
Tel: 01865 572878<br>
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<div>On 29 Jan 2015, at 18:31, Tzvetan Popov <<a href="mailto:tzvetan.popov@uni-konstanz.de">tzvetan.popov@uni-konstanz.de</a>> wrote:</div>
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<div>Hi Payashi,</div>
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<div apple-content-edited="true"> I have computed the ratio per sample and called it ADR. It is a 14x1x480 matrix (channels x freq x time).</div>
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good, so now you squeeze(ADR) in order to get the actual ‘chan_time’ representation. Then you introduce a new variable say tlk_ADR:</div>
<div>tlk_ADR.avg =ADR;</div>
<div>tlk_ADR.label = freq_ADR.label;</div>
<div>tlk_ADR.dimord = freq_ADR.dimord;</div>
<div>tlk_ADR.time = freq_ADR.time;</div>
<div>tlk_ADR.elec = freq_ADR.elec;</div>
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<div>then you call all plotting functions that deal with time domain signals such as ft_multiplotER, ft_singleplotER and ft_topoplotER. Not …TFR. </div>
<div>So your code would look like;</div>
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<div apple-content-edited="true"><font face="Calibri">cfg=[];</font></div>
<div apple-content-edited="true"><font face="Calibri">cfg.xlim = [3000 3200];</font></div>
<div apple-content-edited="true"><font face="Calibri">cfg.colorbar = 'yes';</font></div>
<div apple-content-edited="true"><font face="Calibri">figure</font></div>
<div apple-content-edited="true"><font face="Calibri">ft_topoplotER(cfg, tlk_ADR);</font></div>
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<div>good luck</div>
<div>tzvetan</div>
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