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<div>{{Orphan|date=February 2009}}<br />
{{Merge to|Population_coding|date=May 2012}}<br />
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In [[neuroscience]], a '''population vector''' is the sum of the preferred directions of a population of [[neuron]]s, weighted by the respective spike counts.<br />
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The formula for computing the (normalized) population vector, <math>F</math>, takes the following form:<br />
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<math>F = \frac{\sum_j m_j F_j}{\sum_j m_j}</math><br />
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Where <math>m_j</math> is the activity of cell <math>j</math>, and <math>F_j</math> is the preferred input for cell <math>j</math>.<br />
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Note that the vector <math>F</math> encodes the input direction, <math>F_j</math>, in terms of the activation of a population of neurons.<br />
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{{biology-stub}}<br />
[[Category:Neuroscience]]</div>41.138.233.50