<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.5pt;
font-family:Consolas;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:Consolas;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText>Hi,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I am trying to run an FFT on some EMG data to obtain the peak frequency. This is the script I am using...<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>D= spm_eeg_load;<o:p></o:p></p><p class=MsoPlainText>emg = D.ftraw(0);<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>cfg=[];<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText> cfg.method='mtmfft';<o:p></o:p></p><p class=MsoPlainText> cfg.output='pow';<o:p></o:p></p><p class=MsoPlainText> cfg.taper='hanning';<o:p></o:p></p><p class=MsoPlainText> cfg.channel={'Lforearm'};<o:p></o:p></p><p class=MsoPlainText> cfg.foi= [5 80];% frequency band - foilim or just foi??<o:p></o:p></p><p class=MsoPlainText> freq=ft_freqanalysis(cfg,emg);<o:p></o:p></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText> figure<o:p></o:p></p><p class=MsoPlainText>semilogy(freq.freq, freq.powspctrm(1,:), 'b-');<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>However, I keep getting this error...<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>processing trial 1, ??? Undefined function or variable "dum".<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Error in ==> ft_freqanalysis_mtmfft at 345<o:p></o:p></p><p class=MsoPlainText> fprintf('nfft: %d samples, taper length: %d samples, %d<o:p></o:p></p><p class=MsoPlainText> tapers\n',length(dum),size(tap,2),numtap);<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Error in ==> ft_freqanalysis at 111<o:p></o:p></p><p class=MsoPlainText> [freq] =<o:p></o:p></p><p class=MsoPlainText> feval(sprintf('ft_freqanalysis_%s',lower(cfg.method)), cfg,<o:p></o:p></p><p class=MsoPlainText> data);<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Do you know how to fix this error?<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thanks,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Holly<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>