<div dir="ltr"><div><div><div>Hi Senaka,<br><br></div>The append method is an in-place operation so when you assign it to raw, there is no returned value and therefore it is then mapped to None.<br><br></div>To remedy it, just try `raw0.append(raw1)` and proceed with raw0 for following steps.<br><br></div>HTH,<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Dec 3, 2017 at 5:51 PM, Senaka Amarakeerthi <span dir="ltr"><<a href="mailto:senakahks@gmail.com" target="_blank">senakahks@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><img class="m_6842896399435879972mailtrack-img" alt="" style="display:flex" src="https://mailtrack.io/trace/mail/31837739b38fcaccd266574dc9fcabe3106acd94.png?u=648108" height="0" width="0"><div>Hi,</div><div><br></div><div>I am trying to combine two edf files with the following code,</div><div><br></div><div>raw0 = mne.io.read_raw_edf('file1', preload=True)</div><div>raw1 = mne.io.read_raw_edf('file2', preload=True)</div><div><br></div><div>raw = raw0.append(raw1)</div><div><br></div><div>When I try to plot 19th channel with the following code,</div><div><br></div><div><div>data = raw[:, :][0]</div><div>plt.plot(data[19])</div><div>plt.show()</div></div><div><br></div><div>Following set of error comes</div><div><br></div><pre style="box-sizing:border-box;overflow:auto;padding:0px;margin-top:0px;margin-bottom:0px;line-height:inherit;word-break:break-all;word-wrap:break-word;color:rgb(0,0,0);border:0px;border-radius:0px;white-space:pre-wrap;vertical-align:baseline"><span class="m_6842896399435879972gmail-ansi-red-fg" style="box-sizing:border-box;color:rgb(231,92,88)">TypeError</span> Traceback (most recent call last)
<span class="m_6842896399435879972gmail-ansi-green-fg" style="box-sizing:border-box;color:rgb(0,162,80)"><ipython-input-214-<wbr>345e58904e3a></span> in <span class="m_6842896399435879972gmail-ansi-cyan-fg" style="box-sizing:border-box;color:rgb(96,198,200)"><module></span><span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">()</span>
<span class="m_6842896399435879972gmail-ansi-green-fg" style="box-sizing:border-box;color:rgb(0,162,80)">----> 1</span><span class="m_6842896399435879972gmail-ansi-red-fg" style="box-sizing:border-box;color:rgb(231,92,88)"> </span>data <span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">=</span> raw<span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">[</span><span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">:</span><span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">,</span> <span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">:</span><span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">]</span><span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">[</span><span class="m_6842896399435879972gmail-ansi-cyan-fg" style="box-sizing:border-box;color:rgb(96,198,200)">0</span><span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">]</span>
<span class="m_6842896399435879972gmail-ansi-green-intense-fg m_6842896399435879972gmail-ansi-bold" style="box-sizing:border-box;color:rgb(0,116,39);font-weight:bold"> 2</span> plt<span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">.</span>plot<span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">(</span>data<span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">[</span><span class="m_6842896399435879972gmail-ansi-cyan-fg" style="box-sizing:border-box;color:rgb(96,198,200)">19</span><span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">]</span><span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">)</span>
<span class="m_6842896399435879972gmail-ansi-green-intense-fg m_6842896399435879972gmail-ansi-bold" style="box-sizing:border-box;color:rgb(0,116,39);font-weight:bold"> 3</span> plt<span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">.</span>show<span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">(</span><span class="m_6842896399435879972gmail-ansi-blue-fg" style="box-sizing:border-box;color:rgb(32,143,251)">)</span>
<span class="m_6842896399435879972gmail-ansi-red-fg" style="box-sizing:border-box;color:rgb(231,92,88)">TypeError</span>: 'NoneType' object is not subscriptable</pre><pre style="box-sizing:border-box;overflow:auto;padding:0px;margin-top:0px;margin-bottom:0px;line-height:inherit;word-break:break-all;word-wrap:break-word;color:rgb(0,0,0);border:0px;border-radius:0px;white-space:pre-wrap;vertical-align:baseline"><br></pre><pre style="box-sizing:border-box;overflow:auto;padding:0px;margin-top:0px;margin-bottom:0px;line-height:inherit;word-break:break-all;word-wrap:break-word;color:rgb(0,0,0);border:0px;border-radius:0px;white-space:pre-wrap;vertical-align:baseline"><br></pre><pre style="box-sizing:border-box;overflow:auto;padding:0px;margin-top:0px;margin-bottom:0px;line-height:inherit;word-break:break-all;word-wrap:break-word;color:rgb(0,0,0);border:0px;border-radius:0px;white-space:pre-wrap;vertical-align:baseline">What is wrong with my code?</pre> <br><br><br><div class="m_6842896399435879972mt-signature">
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