systest.signals.segments - Contain supported segment types for creating signals

Syntax

Description

segment = systest.signals.segments.(segment_type) creates a signal with a segment of type segment_type.

The following segment types can be used on the systest.signals.segments function:

• Constant – A segment with a constant value.

  Properties include:

  Duration – The length in seconds of the segment.

  Value – The constant value of the segment.

• Custom – A segment with user-specified time and data vectors.

  Properties include:

  Data – User-specified data vector for each time point.

  Time – User-specified time vector for each point.

  Duration – The length in seconds of the segment.

• Pulse – A segment with a Pulse value.

  Properties include:

  Duration – The length in seconds of the segment.

  InitialValue – The value of the segment before the pulse.

  Offset – The length in seconds before the pulse begins.

  FinalValue – The value of the segment during the pulse.

  PulseWidth – The length in seconds of the pulse.

• Ramp – A segment with a linearly changing value.

  Properties include:

  Duration – The length in seconds of the segment.

  FinalValue – The value the segment finishes at.

  InitialValue – The value the segment starts at.

  Offset – The time in seconds before the ramp starts changing.

  Slope – The rate of change between InitialValue and FinalValue.

• Sine – A periodic sine wave.

  Properties include:

  Amplitude – The amplitude of the sine wave.

  Duration – The length in seconds of the segment.

  InitialValue – The vertical offset of the sine wave.

  PeriodLength – The length of time in seconds for a full period.

  PhaseShift – The amount in degrees started into the first period.

  SampleRate – The amount in seconds between each sampled point.

• Square – A periodic series of pulses.

  Properties include:

  Amplitude – The amplitude of the square wave.

  Duration – The length in seconds of the segment.

  DutyCycle – The percentage of time the wave has positive amplitude.

  InitialValue – The vertical offset of the square wave.

  PeriodLength – The length of time in seconds for a full period.

  PhaseShift – The amount in degrees started into the first period.

• Step – A segment that transitions from a one value to another.

  Properties include:

  Duration – The length in seconds of the segment.

  FinalValue – The value of the segment after Offset.

  InitialValue – The value the segment before Offset.

  Offset – The time in seconds before the step occurs.

Examples

Create a segment of type Constant, with no properties set.

 segment = systest.signals.segments.Constant

Create a segment of type Constant with a value of 5.

 segment = systest.signals.segments.Constant('Value', 5)

Create a segment of type Custom with a time of 0:99 and data of rand(1,100).

 segment = systest.signals.segments.Custom('Time', 0:99, 'Data', rand(1,100))

Create a segment of type Pulse with an offset of 3 and a FinalValue of 2.

 segment = systest.signals.segments.Pulse('Offset', 3, 'FinalValue', 2)

Create a segment of type Ramp with an offset of 2 and a FinalValue of 12.

 segment = systest.signals.segments.Ramp('Offset', 2, 'FinalValue', 12)

Create a segment of type Sine with an amplitude of 5.

 segment = systest.signals.segments.Sine('Amplitude', 5)

Create a segment of type Square with an amplitude of 5.

 segment = systest.signals.segments.Square('Amplitude', 5)

Create a segment of type Step with an InitialValue of 4.

 segment = systest.signals.segments.Step('InitialValue', 4)

How To

• Test Case and Signal Authoring Programmatically

© 1984-2012- The MathWorks, Inc.    -   Site Help   -   Patents   -   Trademarks   -   Privacy Policy   -   Preventing Piracy   -   RSS