PTOLEMY II - CiteSeerX

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Actor Libraries value is true (the default), then at the conclusion of the execution of the model, the axes of the plot will be adjusted to just fit the observed data. All of the sink actors implement the Placeable interface. Actors that implement this interface have graphical widgets that a user of the actor may wish to place on the screen. Vergil constructs a display panel by placing such actors. More customized placement can be achieved by calling the place() method of the Placeable interface in custom Java code. In Vergil, the sinks library is divided into generic sinks, timed sinks, and sequence sinks. The first group includes sinks that are agnostic about whether their inputs are interpreted as timed events or as sequence inputs. The other two groups contain actors for which the input is either timed or is logically a sequence. Generic Sinks Discard (extends Sink): Consume and discard input tokens. Display (extends Sink): Display input tokens in a text area on the screen. MonitorValue (extends Sink): Display input tokens in the icon of the actor in the block diagram. The value parameter specifies what to display before any inputs are provided. Recorder (extends Sink): Record all input tokens for later querying (by Java code). This actor is useful for Java code that executes models and then wishes to query for results. SetVariable (extends TypedAtomicActor): Set the value of a variable contained by the container. The change to the value of the variable takes hold at the end of the current iteration. This helps ensure that users of value of the variable will see changes to the value deterministically (independent of the schedule of execution of the actors). XYPlotter (extends Plotter): Display a plot of the data on each inputY channel vs. the data on the corresponding inputX channel. XYScope (extends XYPlotter): Display a plot of the data on each inputY channel vs. the data on the corresponding inputX channel with finite persistence. Timed Sinks TimedPlotter (extends Plotter): Plot inputs as a function of time. TimedScope (extends TimedPlotter): Plot inputs as a function of time in an oscilloscope style. Sequence Sinks ArrayPlotter (extends Plotter): Plot a sequence of arrays of doubles. BarGraph (extends ArrayPlotter): Plot bar graphs, given arrays of doubles as inputs. HistogramPlotter (extends PlotterBase): Display a histogram of the data on each input channel. SequencePlotter (extends Plotter): Plot the input tokens vs. their index number. 134 Ptolemy <strong>II</strong>
Actor Libraries SequenceScope (extends SequencePlotter): Plot sequences that are potentially infinitely long in an oscilloscope style. 4.3.3 Array The array library supports manipulations of arrays, which are ordered collections of tokens of arbitrary type. ArrayAppend (extends Transformer): Append arrays on the input channels to produce a single output array. ArrayAverage (extends Transformer): Output the average of the input array. ArrayElement (extends Transformer): Extract an element from an array and produce it on the output. ArrayExtract (extends Transformer): Extract a subarray from an array and produce it on the output. ArrayLength (extends Transformer): Output the length of the input array. ArrayLevelCrossing (extends TypedAtomicActor): Find and output the index of the first item in an input array to cross a specified threshold. ArrayMaximum (extends Transformer): Extract the maximum element from an array. ArrayMinimum (extends Transformer): Extract the minimum element from an array. ArrayPeakSearch (extends TypedAtomicActor): Output the indices and values of peaks in an input array. ArraySort (extends Transformer): Sort the elements of an input array. ArrayToElements (extends Transformer): Send out each element of an input array to the corresponding channel of the output port. ArrayToSequence (extends SDFTransformer): Extract all elements from an input array and produce them sequentially on the output port. ElementsToArray (extends Transformer): Read exactly one token from each channel of the input port, assemble the tokens into an array and send it to the output port. SequenceToArray (extends SDFTransformer): Collect a sequence of inputs into an array and produce the array on the output port. 4.3.4 Conversions Ptolemy <strong>II</strong> has a sophisticated type system that allows actors to be polymorphic (to operate on multiple data types). Typically, actors express type constraints between their ports and their parameters. When actors are connected, these type constraints are resolved to determine the type of each port. Conversions between types are automatic if they result in no loss of data. However, sometimes, a model builder may wish to force a particular conversion. The actors in the conversions library support this. BooleanToAnything (extends Converter): Convert a Boolean input token to any data type. Heterogeneous Concurrent Modeling and Design 135
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PTOLEMY II HETEROGENEOUS CONCURRENT
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VOLUME 1 INTRODUCTION TO PTOLEMY II
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Volume 1 Contents Introduction to P
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2.10.3. Constructing Modal Models 8
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7. MoML 191 7.1. Introduction 191 7
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1 Introduction Author: Edward A. Le
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Introduction heterochronous dataflo
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Introduction A major emphasis in Pt
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Introduction determine when actors
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Introduction provides levels of vis
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Introduction is a guard, and the se
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Introduction well. All of these are
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Introduction clients to update thei
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Introduction will be supplied with
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Introduction 1.3.12 Synchronous Dat
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Introduction FIGURE 1.10. Refinemen
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Introduction occlusions due to terr
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Introduction tion. The overall arch
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Introduction kernel.attributes This
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Introduction 1.5.2 Overview of Key
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Introduction Actor interfaces are k
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Heterogeneous Concurrent Modeling a
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Introduction actor actor.gui data.e
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Introduction cient, scalable, and u
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Introduction 1.5.8 Future Capabilit
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Introduction Appendix A: UML — Un
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Introduction grams, the only constr
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2 Using Vergil Authors: Edward A. L
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Using Vergil 2.2.2 Executing a Pre-
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Using Vergil The Lorenz attractor m
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Using Vergil The Continuous-Time (C
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Using Vergil box in figure 2.11. En
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Using Vergil Don’t panic! Excepti
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Using Vergil tions are a normal par
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Using Vergil 2.4 Hierarchy Ptolemy
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Using Vergil Then using these ports
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Using Vergil the default 0.1 to 0.0
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Using Vergil pan window, it is easy
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Using Vergil FIGURE 2.33. The pan w
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Using Vergil we have modified the c
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Using Vergil model, simply copy (or
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Using Vergil A key issue is to deci
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Using Vergil instances. This proble
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Using Vergil quick tour for more de
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Using Vergil uses the index in the
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Using Vergil AddSubtract actor, and
Page 93 and 94: Using Vergil If you look inside the
Page 95 and 96: Using Vergil If you look inside the
Page 97 and 98: Using Vergil transition (or right c
Page 99 and 100: Using Vergil Once you have created
Page 101 and 102: Using Vergil The grid is turned off
Page 103 and 104: Authors: Edward A. Lee Xiaojun Liu
Page 105 and 106: Expressions classes to create a gen
Page 107 and 108: Expressions The % operation is a mo
Page 109 and 110: Expressions attribute, which includ
Page 111 and 112: Expressions 3.3.5 State Machines Ex
Page 113 and 114: Expressions whose value is an array
Page 115 and 116: Expressions from it. For instance,
Page 117 and 118: Expressions defined. For example, >
Page 119 and 120: Expressions length is given by the
Page 121 and 122: Expressions Thus, for example, you
Page 123 and 124: Expressions number. With one additi
Page 125 and 126: Expressions value. For example, fix
Page 127 and 128: Expressions In the example in figur
Page 129 and 130: Expressions A.2 Basic Mathematical
Page 131 and 132: Expressions A.3 Matrix, Array, and
Page 133 and 134: Expressions A.5 Signal Processing F
Page 135 and 136: Expressions TABLE 8: Functions perf
Page 137 and 138: 4 Actor Libraries Authors: Elaine C
Page 139 and 140: Actor Libraries properly in the CT
Page 141 and 142: Actor Libraries ing that multiple c
Page 143: Actor Libraries TypedAtomicActor «
Page 147 and 148: Actor Libraries UnsignedByteArrayTo
Page 149 and 150: Actor Libraries MobileFunction (ext
Page 151 and 152: Actor Libraries LogicFunction (exte
Page 153 and 154: Actor Libraries Sleep (extends Tran
Page 155 and 156: Actor Libraries VariableFIR (extend
Page 157 and 158: Actor Libraries Integrator: Integra
Page 159 and 160: Actor Libraries Figure 4.4 shows th
Page 161 and 162: 5 Designing Actors Authors: Christo
Page 163 and 164: Designing Actors /** Javadoc commen
Page 165 and 166: Designing Actors although with most
Page 167 and 168: Designing Actors import ptolemy.act
Page 169 and 170: Designing Actors makes such actors
Page 171 and 172: Designing Actors same parameter val
Page 173 and 174: Designing Actors morphic actor comp
Page 175 and 176: Designing Actors To get data polymo
Page 177 and 178: Designing Actors public class Seque
Page 179 and 180: Designing Actors be used in domains
Page 181 and 182: Designing Actors alComm actor. Beca
Page 183 and 184: Designing Actors attribute has valu
Page 185 and 186: Designing Actors import ptolemy.act
Page 187 and 188: 6 Coding Style Authors: Christopher
Page 189 and 190: Coding Style /* One line descriptio
Page 191 and 192: Coding Style Copyright (c) 2004 The
Page 193 and 194: Coding Style @version $Id: NamedObj
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Coding Style } We use instead the i
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Coding Style * @exception MyExcepti
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Coding Style + "it does not impleme
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Authors: Edward A. Lee Steve Neuend
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MoML cutes it forever, until you hi
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MoML A second difference between ou
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MoML
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MoML 7.3.3 Names and Classes Most M
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MoML Here, the element named
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MoML implement. 7.3.7 Doc Element S
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MoML It is also sometimes necess
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MoML then there will be a link t
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MoML found. For example, if the cla
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MoML it cannot collide with the nam
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MoML The rendering of the icon is d
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MoML 7.4.5 Deleting Entities, Relat
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MoML This unlinks a port from the s
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MoML model. The EntityLibrary class
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MoML Suppose that using incremental
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MoML Generate a sine wave.
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MoML
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MoML Number of iterations in
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MoML -P- The f
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MoML -P- The phase,
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8 Custom Applets Authors: Edward A.
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Custom Applets html code, see the J
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Custom Applets public class Tutoria
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Custom Applets then the result of
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Custom Applets 8.3.5 Using Model Pa
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Custom Applets ptolemy/domains/doma
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References [1] G. Agha, Actors: A M
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[33] S. A. Edwards, “The Specific
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[67] E. Kohler, The Click Modular R
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[95] J. Liu, X. Liu, T. J. Koo, B.
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[132]W. R. Sutherland, "The on-Line
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Glossary abstract syntax ..........
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Ptolemy II ........................
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Index Symbols - in UML 41 # in UML
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coin flips 142 Color class 173 colo
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entity in XML 198 EntityLibrary cla
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Director class 159 inverse FFT 124
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CompositeEntity class 206 nextPower
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safety 34 SampleDelay actor 78, 138
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type constraint 155 type constraint
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