<div dir="ltr">Hello again,<br><br>I tried out the eyetracking tutorial, and ran into an error when running the down-sampling step:<br><br><div style="margin-left:40px">>>> ds = fft_resample(raw_ds, 100, window='hann',<br>
... chunks_attr='trial', attr_strategy='sample')<br>python(2418) malloc: *** error for object 0x7fbad35fc008: incorrect checksum for freed object - object was probably modified after being freed.<br>
*** set a breakpoint in malloc_error_break to debug<br>Abort trap: 6<br></div><br>Do you know where I'm going wrong?<br><br>Thanks so much for your help,<br>-Bruna<br><br><div class="gmail_quote">On Mon, Sep 17, 2012 at 3:53 PM, Bruna Martins <span dir="ltr"><<a href="mailto:bruna.martins@usc.edu" target="_blank">bruna.martins@usc.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>Hi There,<br><br>I am a complete newbie to PyMVPA, and currently doing an eyetracking study. I'm currently navigating the eyetracking tutorial, but wanted to get your pearls as well- thanks for your patience in advance. My study has a within-subjects design, where each trial is either condition A or B, and we're looking at gaze differences between the conditions. Stimuli are randomly presented either on the left or the right side of the screen, so the analysis is a little complex . I am hoping to do two different things:<br>
<br>1. Input difference scores between (Xcoord- Xcenter) and (Ycoord- Ycenter) for each trial- there will be a different number of trackable instances for each timepoint (depending on whether track was lost, blink frequency, etc) to predict condition A vs B<br>
<br clear="all">2. Input a scalar value indicating the percentage of time spent within the stimulus area of interest on the screen (ie, 0.70 = on the stimulus for 70% on stimulus), for each trial, and again predict whether the trial was of condition A or B, but this time have one value per trial<br>
<br>I was wondering how you would recommend approaching the two analyses outlined above. <br><br>Thanks so much for your help,<br>Bruna Martins<span class="HOEnZb"><font color="#888888"><br><br><br>-- <br><div dir="ltr">
<b>Bruna S. Martins</b><div><b><br></b><div>
<div><div>Ph.D. Student- Clinical Psychology</div><div>Emotion & Cognition Lab- Gero 341</div><div><div>University of Southern California</div><div><a href="tel:%28213%29%20821-%205701" value="+12138215701" target="_blank">(213) 821- 5701</a><br>
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</blockquote></div><br><br clear="all"><br>-- <br><div><b>Bruna S. Martins</b><div><b><br></b><div><div><div>Ph.D. Student- Clinical Psychology</div><div>Emotion & Cognition Lab- Gero 341</div><div><div>University of Southern California</div>
<div>(213) 821- 5701<br></div></div></div></div></div></div><br>
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