<div dir="ltr"><p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">Dear all,</span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US"> </span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">I am working on eeg signal processing. I have 19 channel eeg recorded data in
edf format. I am applying FFT. I use Topoplot function to draw map figures
using averaged FFT data. </span><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US"> I have written following program in MATLAB<br></span></p><p style="margin-bottom:0.0001pt;line-height:normal">
<span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">[outData PS datavector]=fft_powers(cha);</span></p><p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">[handle,Zi,grid,Xi,Yi] = topoplot(datavector,'Standard-10-20-Cap19.locs')</span></p>
<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">An error is occurred:<br></span></p><p style="margin-bottom:0.0001pt;line-height:normal">
<span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US"><br></span></p> <p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">??? Error using ==> mldivide</span></p>


<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">Matrix dimensions must agree.</span></p>

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<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">Error in ==> topoplot at 890</span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">squeezefac = rmax/plotrad;</span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US"> </span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">Error in ==> powerfft at 67</span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">[handle,Zi,grid,Xi,Yi] = topoplot(datavector,'Standard-10-20-Cap19.locs')</span></p>



<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US"> </span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><br></p><div style="font-family:arial,sans-serif;font-size:13px">Therefore, it 
is requested in your kind honor to please guide me in this regard as I 
am working on EEGlab these days and need your urgent help.</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">I hope you will send me positive and helpful response.</div>


<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US"> </span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US"> </span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US"> </span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"" lang="EN-US">Thanks a lot in advance!</span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"">Best,</span></p>

<p style="margin-bottom:0.0001pt;line-height:normal"><span style="font-size:12pt;font-family:"Times New Roman","serif"">ahmed</span></p></div>