AccelerationFeatures class
A set of acceleration (non-gravitational) features collected over a specific sampling period.
The set of features is inspired from the Medium article on Feature Engineering on Time-Series Data for Human Activity Recognition and contains the following 15 simple statistical features:
- mean
- standard deviation
- average absolute deviation
- minimum value
- maximum value
- difference of maximum and minimum values
- median
- median absolute deviation
- inter-quartile range
- negative values count
- positive values count
- number of values above mean
- energy
- average resultant acceleration
- signal magnitude area
Most of these features are self-explanatory, except:
- Energy of a signal in every axis is computed by taking the mean of sum of squares of the values in a window in that particular axis.
- Average resultant acceleration over the window is computed by taking average of the square roots of the values in each of the three axis squared and added together.
- Signal magnitude area is defined as the sum of absolute values of the three axis averaged over a window.
- Inheritance
-
- Object
- Serializable
- Data
- SensorData
- AccelerationFeatures
- Annotations
-
- @JsonSerializable.new(includeIfNull: false, explicitToJson: true)
Constructors
- AccelerationFeatures()
-
AccelerationFeatures.fromAccelerometerReadings(List<
UserAccelerometerEvent> readings) -
factory
-
AccelerationFeatures.fromJson(Map<
String, dynamic> json) -
factory
Properties
- $type ↔ String?
-
The runtime class name (type) of this object.
Used for deserialization from JSON objects.
getter/setter pairinherited
- avgResultAcceleration ↔ num?
-
getter/setter pair
- count ↔ int
-
getter/setter pair
- dataType → DataType
-
The type of this data as a
DataType.no setterinherited - fromJsonFunction → Function
-
The function which can convert a JSON string to an object of this type.
no setteroverride
- hashCode → int
-
The hash code for this object.
no setterinherited
- jsonType → String
-
Return the
__typeto be used for JSON serialization of this class. Default is runtimeType. Only specify this if you need another type.no setterinherited - recordId → String?
-
Stable identifier of the source record, if available.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- sensorSpecificData ↔ Data?
-
Additional sensor-specific data pertaining to this data point.
This can be used to append highly-specific sensor data to an otherwise
common data type.
getter/setter pairinherited
- signalMagnitudeArea ↔ num?
-
getter/setter pair
- xAad ↔ num?
-
getter/setter pair
- xAboveMean ↔ num?
-
getter/setter pair
- xEnergy ↔ num?
-
getter/setter pair
- xIqr ↔ num?
-
getter/setter pair
- xMad ↔ num?
-
getter/setter pair
- xMax ↔ num?
-
getter/setter pair
- xMaxMinDiff ↔ num?
-
getter/setter pair
- xMean ↔ num?
-
getter/setter pair
- xMedian ↔ num?
-
getter/setter pair
- xMin ↔ num?
-
getter/setter pair
- xNegCount ↔ num?
-
getter/setter pair
- xPosCount ↔ num?
-
getter/setter pair
- xStd ↔ num?
-
getter/setter pair
- yAad ↔ num?
-
getter/setter pair
- yAboveMean ↔ num?
-
getter/setter pair
- yEnergy ↔ num?
-
getter/setter pair
- yIqr ↔ num?
-
getter/setter pair
- yMad ↔ num?
-
getter/setter pair
- yMax ↔ num?
-
getter/setter pair
- yMaxMinDiff ↔ num?
-
getter/setter pair
- yMean ↔ num?
-
getter/setter pair
- yMedian ↔ num?
-
getter/setter pair
- yMin ↔ num?
-
getter/setter pair
- yNegCount ↔ num?
-
getter/setter pair
- yPosCount ↔ num?
-
getter/setter pair
- yStd ↔ num?
-
getter/setter pair
- zAad ↔ num?
-
getter/setter pair
- zAboveMean ↔ num?
-
getter/setter pair
- zEnergy ↔ num?
-
getter/setter pair
- zIqr ↔ num?
-
getter/setter pair
- zMad ↔ num?
-
getter/setter pair
- zMax ↔ num?
-
getter/setter pair
- zMaxMinDiff ↔ num?
-
getter/setter pair
- zMean ↔ num?
-
getter/setter pair
- zMedian ↔ num?
-
getter/setter pair
- zMin ↔ num?
-
getter/setter pair
- zNegCount ↔ num?
-
getter/setter pair
- zPosCount ↔ num?
-
getter/setter pair
- zStd ↔ num?
-
getter/setter pair
Methods
-
equivalentTo(
Data other) → bool -
Is this data equivalent to
other?inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toJson(
) → Map< String, dynamic> -
Return a JSON encoding of this object.
override
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited