usage:tracking

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usage:tracking [2020/06/06 00:48] – [Video demonstration] pseudomoanerusage:tracking [2021/03/06 15:44] (current) – pseudomoaner
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 Firstly, it can be used to verify that each feature is properly normalised. If they have been properly normalised, the displayed scatterplot should be isotropic (radially symmetric) and centred on the origin. Below are examples of well-normalised (left) and poorly normalised (right) features: Firstly, it can be used to verify that each feature is properly normalised. If they have been properly normalised, the displayed scatterplot should be isotropic (radially symmetric) and centred on the origin. Below are examples of well-normalised (left) and poorly normalised (right) features:
  
-<WRAP group> 
 <WRAP half column centeralign> <WRAP half column centeralign>
 {{ :usage:well-normalised.png?nolink&400 }} {{ :usage:well-normalised.png?nolink&400 }}
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 <WRAP half column centeralign> <WRAP half column centeralign>
 {{ :usage:poorly-normalised.png?nolink&400 }} {{ :usage:poorly-normalised.png?nolink&400 }}
-</WRAP> 
 </WRAP> </WRAP>
  
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   * **x** and **y:** The instantaneous coordinates of the object over time. Each is a $t \times 1$ vector.   * **x** and **y:** The instantaneous coordinates of the object over time. Each is a $t \times 1$ vector.
-  * **smoothx** and **smoothy:** The instantaneous coordinates of the object over time, smoothed using the [[https://uk.mathworks.com/help/curvefit/smooth.html#mw_ad6b65fd-4dac-46c4-a649-a7a0b301eb80|loess method]] with a span of 1% of the total track length. Each is a $t \times 1$ vector. 
   * **theta** and **vmag:** The instantaneous direction of motion (in degrees) and speed of the object. Each is a $(t-1) \times 1$ vector.   * **theta** and **vmag:** The instantaneous direction of motion (in degrees) and speed of the object. Each is a $(t-1) \times 1$ vector.
-  * **smoothTheta** and **smoothVmag:** The instantaneous direction of motion (in degrees) and speed of the object, calculated from **smoothx** and **smoothy**. Each is a $(t-1) \times 1$ vector. 
   * **times:** The timepoints the object's position was sampled at. As gaps in tracks can be bridged, this list of timepoints is not necessarily contiguous. A $t \times 1$ vector.   * **times:** The timepoints the object's position was sampled at. As gaps in tracks can be bridged, this list of timepoints is not necessarily contiguous. A $t \times 1$ vector.
   * **length:** Total length (in timepoints) of the track.   * **length:** Total length (in timepoints) of the track.
   * **start** and **end:** Start and end timepoints of the track.   * **start** and **end:** Start and end timepoints of the track.
   * **age:** The age of the object relative to the start of the track at each timepoint. Equivalent to **times** - **start**.   * **age:** The age of the object relative to the start of the track at each timepoint. Equivalent to **times** - **start**.
 +  * **interpolated:** $(t-1) \times 1$ logical vector indicating whether there was a gap in the track at this timepoint. If so, values in all other fields for this timepoint have been linearly interpolated from surrounding values.
  
 Depending on the options selected in the [[usage:feature_extraction|feature extraction module]], additional fields may also be available: Depending on the options selected in the [[usage:feature_extraction|feature extraction module]], additional fields may also be available:
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 ===== Video demonstration ===== ===== Video demonstration =====
  
 +====Part 1====
 {{ youtube>EW4hl439Xp4?large }} {{ youtube>EW4hl439Xp4?large }}
 +
 +====Part 2====
 {{ youtube>GckUtXZcGkY?large }} {{ youtube>GckUtXZcGkY?large }}
  
  • usage/tracking.1591400888.txt.gz
  • Last modified: 2020/06/06 00:48
  • by pseudomoaner