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<h1 id="phone-data-quality">Phone Data Quality<a class="headerlink" href="#phone-data-quality" title="Permanent link">&para;</a></h1>
<h2 id="phone-valid-sensed-bins">Phone Valid Sensed Bins<a class="headerlink" href="#phone-valid-sensed-bins" title="Permanent link">&para;</a></h2>
<p>A valid bin is any period of <code>BIN_SIZE</code> minutes starting from midnight with at least 1 row from any phone sensor. <code>PHONE_VALID_SENSED_BINS</code> are used to compute <code>PHONE_VALID_SENSED_DAYS</code>, to resample fused location data and to compute some screen features.</p>
<div class="admonition hint">
<p class="admonition-title">Hint</p>
<p><code>PHONE_VALID_SENSED_DAYS</code> are an approximation to the time the phone was sensing data so add as many sensors as you have to <code>[PHONE_VALID_SENSED_BINS][PHONE_SENSORS]</code></p>
</div>
<p>Parameters description for <code>PHONE_VALID_SENSED_BINS</code>:</p>
<table>
<thead>
<tr>
<th>Key&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>[COMPUTE]</code></td>
<td>Set to <code>True</code> to compute</td>
</tr>
<tr>
<td><code>[BIN_SIZE]</code></td>
<td>Size of each bin in minutes</td>
</tr>
<tr>
<td><code>[PHONE_SENSORS]</code></td>
<td>One or more sensor config keys (e.g. <code>PHONE_MESSAGE</code>) to be used to flag a bin as valid or not (whether or not a bin contains at least one row from any sensor)</td>
</tr>
</tbody>
</table>
<div class="admonition info">
<p class="admonition-title">Possible values for <code>[PHONE_VALID_SENSED_BINS][PHONE_SENSORS]</code></p>
<div class="highlight"><pre><span></span><code><span class="l l-Scalar l-Scalar-Plain">PHONE_MESSAGES</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_CALLS</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_LOCATIONS</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_BLUETOOTH</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_ACTIVITY_RECOGNITION</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_BATTERY</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_SCREEN</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_LIGHT</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_ACCELEROMETER</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_APPLICATIONS_FOREGROUND</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_WIFI_VISIBLE</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_WIFI_CONNECTED</span>
<span class="l l-Scalar l-Scalar-Plain">PHONE_CONVERSATION</span>
</code></pre></div>
</div>
<h2 id="phone-valid-sensed-days">Phone Valid Sensed Days<a class="headerlink" href="#phone-valid-sensed-days" title="Permanent link">&para;</a></h2>
<p>On any given day, a phone could have sensed data only for a few minutes or for 24 hours. Features should considered more reliable the more hours the phone was logging data, for example, 10 calls logged on a day when only 1 hour of data was recorded is a less reliable feature compared to 10 calls on a day when 23 hours of data were recorded.</p>
<p>Therefore, we define a valid hour as those that contain a minimum number of valid bins (see above). We mark an hour as valid when contains at least <code>MIN_VALID_BINS_PER_HOUR</code> (out of 60min/<code>BIN_SIZE</code> bins). In turn, we mark a day as valid if it has at least <code>MIN_VALID_HOURS_PER_DAY</code>. You can use <code>PHONE_VALID_SENSED_DAYS</code> to manually discard days when not enough data was collected after your features are computed.</p>
<p>Parameters description for <code>PHONE_VALID_SENSED_DAYS</code>:</p>
<table>
<thead>
<tr>
<th>Key&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>[COMPUTE]</code></td>
<td>Set to <code>True</code> to compute</td>
</tr>
<tr>
<td><code>[MIN_VALID_BINS_PER_HOUR]</code></td>
<td>An array of integer values, 6 by default. Minimum number of valid bins to mark an hour as valid</td>
</tr>
<tr>
<td><code>[MIN_VALID_HOURS_PER_DAY]</code></td>
<td>An array of integer values, 16 by default. Minimum number of valid hours to mark a day as valid</td>
</tr>
</tbody>
</table>
</article>
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