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music21.graph

Object definitions for graphing and plotting Stream objects. The Graph object subclasses abstract fundamental graphing archetypes using the matplotlib library. The Plot object subclasses provide reusable approaches to graphing data and structures in Stream objects.

music21.graph.plotStream(streamObj, *args, **keywords)

Given a stream and any keyword configuration arguments, create and display a plot. Note: plots requires matplotib to be installed. Plot methods can be specified as additional arguments or by keyword. Two keyword arguments can be given: format and values. If positional arguments are given, the first is taken as format and the rest are collected as values. If format is the class name, that class is collected. Additionally, every PlotStream subclass defines one format string and a list of values strings. The format parameter defines the type of Graph (e.g. scatter, histogram, colorGrid). The values list defines what values are graphed (e.g. quarterLength, pitch, pitchClass). If a user provides a format and one or more values strings, a plot with the corresponding profile, if found, will be generated. If not, the first Plot to match any of the defined specifiers will be created. In the case of PlotWindowedAnalysis subclasses, the DiscreteAnalysis subclass indentifiers list is added to the Plot’s values list. Available plots include the following: PlotHistogramPitchSpace PlotHistogramPitchClass PlotHistogramQuarterLength PlotScatterPitchSpaceQuarterLength PlotScatterPitchClassQuarterLength PlotScatterPitchClassOffset PlotScatterPitchSpaceDynamicSymbol PlotHorizontalBarPitchSpaceOffset PlotHorizontalBarPitchClassOffset PlotScatterWeightedPitchSpaceQuarterLength PlotScatterWeightedPitchClassQuarterLength PlotScatterWeightedPitchSpaceDynamicSymbol Plot3DBarsPitchSpaceQuarterLength PlotWindowedKrumhanslSchmuckler PlotWindowedSadoianAmbitus

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> s.plot('histogram', 'pitch')
_images/PlotHistogramPitchSpace.png
>>> s = corpus.parseWork('bach/bwv57.8')
>>> s.plot('pianoroll')
_images/PlotHorizontalBarPitchSpaceOffset.png

PlotHistogramPitchSpace

Inherits from: PlotHistogram, PlotStream

class music21.graph.PlotHistogramPitchSpace(streamObj, *args, **keywords)

A histogram of pitch space.

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotHistogramPitchSpace(s)
>>> p.id
'histogram-pitch'
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotHistogramPitchSpace.png

PlotHistogramPitchSpace attributes

Attributes without Documentation: values

Attributes inherited from PlotHistogram: format

PlotHistogramPitchSpace properties

Properties inherited from PlotStream: id

PlotHistogramPitchSpace methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotHistogramPitchClass

Inherits from: PlotHistogram, PlotStream

class music21.graph.PlotHistogramPitchClass(streamObj, *args, **keywords)

A histogram of pitch class

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotHistogramPitchClass(s)
>>> p.id
'histogram-pitchClass'
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotHistogramPitchClass.png

PlotHistogramPitchClass attributes

Attributes without Documentation: values

Attributes inherited from PlotHistogram: format

PlotHistogramPitchClass properties

Properties inherited from PlotStream: id

PlotHistogramPitchClass methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotHistogramQuarterLength

Inherits from: PlotHistogram, PlotStream

class music21.graph.PlotHistogramQuarterLength(streamObj, *args, **keywords)

A histogram of pitch class

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotHistogramQuarterLength(s)
>>> p.id
'histogram-quarterLength'
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotHistogramQuarterLength.png

PlotHistogramQuarterLength attributes

Attributes without Documentation: values

Attributes inherited from PlotHistogram: format

PlotHistogramQuarterLength properties

Properties inherited from PlotStream: id

PlotHistogramQuarterLength methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotWindowedKrumhanslSchmuckler

Inherits from: PlotWindowedAnalysis, PlotStream

class music21.graph.PlotWindowedKrumhanslSchmuckler(streamObj, *args, **keywords)

Stream plotting of windowed version of Krumhansl-Schmuckler analysis routine.

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv66.6')
>>> p = graph.PlotWindowedKrumhanslSchmuckler(s.parts[0])
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotWindowedKrumhanslSchmuckler.png _images/legend-PlotWindowedKrumhanslSchmuckler.png

PlotWindowedKrumhanslSchmuckler attributes

Attributes without Documentation: values

Attributes inherited from PlotWindowedAnalysis: format

PlotWindowedKrumhanslSchmuckler properties

Properties inherited from PlotStream: id

PlotWindowedKrumhanslSchmuckler methods

Methods inherited from PlotWindowedAnalysis: process(), write()

Methods inherited from PlotStream: remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength()

PlotWindowedSadoianAmbitus

Inherits from: PlotWindowedAnalysis, PlotStream

class music21.graph.PlotWindowedSadoianAmbitus(streamObj, *args, **keywords)

Stream plotting of basic pitch span.

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv66.6')
>>> p = graph.PlotWindowedSadoianAmbitus(s.parts[0])
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotWindowedSadoianAmbitus.png _images/legend-PlotWindowedSadoianAmbitus.png

PlotWindowedSadoianAmbitus attributes

Attributes without Documentation: values

Attributes inherited from PlotWindowedAnalysis: format

PlotWindowedSadoianAmbitus properties

Properties inherited from PlotStream: id

PlotWindowedSadoianAmbitus methods

Methods inherited from PlotWindowedAnalysis: process(), write()

Methods inherited from PlotStream: remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength()

PlotScatterPitchSpaceQuarterLength

Inherits from: PlotScatter, PlotStream

class music21.graph.PlotScatterPitchSpaceQuarterLength(streamObj, *args, **keywords)

A scatter plot of pitch space and quarter length

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotScatterPitchSpaceQuarterLength(s)
>>> p.id
'scatter-pitch-quarterLength'
>>> p.process()
_images/PlotScatterPitchSpaceQuarterLength.png

PlotScatterPitchSpaceQuarterLength attributes

Attributes without Documentation: values

Attributes inherited from PlotScatter: format

PlotScatterPitchSpaceQuarterLength properties

Properties inherited from PlotStream: id

PlotScatterPitchSpaceQuarterLength methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotScatterPitchClassQuarterLength

Inherits from: PlotScatter, PlotStream

class music21.graph.PlotScatterPitchClassQuarterLength(streamObj, *args, **keywords)

A scatter plot of pitch class and quarter length

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotScatterPitchClassQuarterLength(s)
>>> p.id
'scatter-pitchClass-quarterLength'
>>> p.process()
_images/PlotScatterPitchClassQuarterLength.png

PlotScatterPitchClassQuarterLength attributes

Attributes without Documentation: values

Attributes inherited from PlotScatter: format

PlotScatterPitchClassQuarterLength properties

Properties inherited from PlotStream: id

PlotScatterPitchClassQuarterLength methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotScatterPitchClassOffset

Inherits from: PlotScatter, PlotStream

class music21.graph.PlotScatterPitchClassOffset(streamObj, *args, **keywords)

A scatter plot of pitch class and offset

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotScatterPitchClassOffset(s)
>>> p.id
'scatter-pitchClass-offset'
>>> p.process()
_images/PlotScatterPitchClassOffset.png

PlotScatterPitchClassOffset attributes

Attributes without Documentation: values

Attributes inherited from PlotScatter: format

PlotScatterPitchClassOffset properties

Properties inherited from PlotStream: id

PlotScatterPitchClassOffset methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotScatterPitchSpaceDynamicSymbol

Inherits from: PlotScatter, PlotStream

class music21.graph.PlotScatterPitchSpaceDynamicSymbol(streamObj, *args, **keywords)

A graph of dynamics used by pitch space.

>>> from music21 import *
>>> s = corpus.parseWork('schumann/opus41no1', 2)
>>> p = graph.PlotScatterPitchSpaceDynamicSymbol(s)
>>> p.process()
_images/PlotScatterPitchSpaceDynamicSymbol.png

PlotScatterPitchSpaceDynamicSymbol attributes

Attributes without Documentation: values

Attributes inherited from PlotScatter: format

PlotScatterPitchSpaceDynamicSymbol properties

Properties inherited from PlotStream: id

PlotScatterPitchSpaceDynamicSymbol methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotHorizontalBarPitchSpaceOffset

Inherits from: PlotHorizontalBar, PlotStream

class music21.graph.PlotHorizontalBarPitchSpaceOffset(streamObj, *args, **keywords)

A graph of events, sorted by pitch space, over time

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotHorizontalBarPitchSpaceOffset(s)
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotHorizontalBarPitchSpaceOffset.png

PlotHorizontalBarPitchSpaceOffset attributes

Attributes without Documentation: values

Attributes inherited from PlotHorizontalBar: format

PlotHorizontalBarPitchSpaceOffset properties

Properties inherited from PlotStream: id

PlotHorizontalBarPitchSpaceOffset methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotHorizontalBarPitchClassOffset

Inherits from: PlotHorizontalBar, PlotStream

class music21.graph.PlotHorizontalBarPitchClassOffset(streamObj, *args, **keywords)

A graph of events, sorted by pitch class, over time

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotHorizontalBarPitchClassOffset(s)
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotHorizontalBarPitchClassOffset.png

PlotHorizontalBarPitchClassOffset attributes

Attributes without Documentation: values

Attributes inherited from PlotHorizontalBar: format

PlotHorizontalBarPitchClassOffset properties

Properties inherited from PlotStream: id

PlotHorizontalBarPitchClassOffset methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotScatterWeightedPitchSpaceQuarterLength

Inherits from: PlotScatterWeighted, PlotStream

class music21.graph.PlotScatterWeightedPitchSpaceQuarterLength(streamObj, *args, **keywords)

A graph of event, sorted by pitch, over time

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotScatterWeightedPitchSpaceQuarterLength(s)
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotScatterWeightedPitchSpaceQuarterLength.png

PlotScatterWeightedPitchSpaceQuarterLength attributes

Attributes without Documentation: values

Attributes inherited from PlotScatterWeighted: format

PlotScatterWeightedPitchSpaceQuarterLength properties

Properties inherited from PlotStream: id

PlotScatterWeightedPitchSpaceQuarterLength methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotScatterWeightedPitchClassQuarterLength

Inherits from: PlotScatterWeighted, PlotStream

class music21.graph.PlotScatterWeightedPitchClassQuarterLength(streamObj, *args, **keywords)

A graph of event, sorted by pitch class, over time.

>>> from music21 import *
>>> s = corpus.parseWork('bach/bwv57.8')
>>> p = graph.PlotScatterWeightedPitchClassQuarterLength(s)
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotScatterWeightedPitchClassQuarterLength.png

PlotScatterWeightedPitchClassQuarterLength attributes

Attributes without Documentation: values

Attributes inherited from PlotScatterWeighted: format

PlotScatterWeightedPitchClassQuarterLength properties

Properties inherited from PlotStream: id

PlotScatterWeightedPitchClassQuarterLength methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotScatterWeightedPitchSpaceDynamicSymbol

Inherits from: PlotScatterWeighted, PlotStream

class music21.graph.PlotScatterWeightedPitchSpaceDynamicSymbol(streamObj, *args, **keywords)

A graph of dynamics used by pitch space.

>>> from music21 import *
>>> s = corpus.parseWork('schumann/opus41no1', 2)
>>> p = graph.PlotScatterWeightedPitchSpaceDynamicSymbol(s)
>>> p.process() # with defaults and proper configuration, will open graph
_images/PlotScatterWeightedPitchSpaceDynamicSymbol.png

PlotScatterWeightedPitchSpaceDynamicSymbol attributes

Attributes without Documentation: values

Attributes inherited from PlotScatterWeighted: format

PlotScatterWeightedPitchSpaceDynamicSymbol properties

Properties inherited from PlotStream: id

PlotScatterWeightedPitchSpaceDynamicSymbol methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

Plot3DBarsPitchSpaceQuarterLength

Inherits from: Plot3DBars, PlotStream

class music21.graph.Plot3DBarsPitchSpaceQuarterLength(streamObj, *args, **keywords)

A scatter plot of pitch and quarter length

>>> from music21 import *
>>> from music21.musicxml import testFiles
>>> s = converter.parse(testFiles.mozartTrioK581Excerpt)
>>> p = graph.Plot3DBarsPitchSpaceQuarterLength(s)
>>> p.id
'3dBars-pitch-quarterLength'
>>> p.process() # with defaults and proper configuration, will open graph
_images/Plot3DBarsPitchSpaceQuarterLength.png

Plot3DBarsPitchSpaceQuarterLength attributes

Attributes without Documentation: values

Attributes inherited from Plot3DBars: format

Plot3DBarsPitchSpaceQuarterLength properties

Properties inherited from PlotStream: id

Plot3DBarsPitchSpaceQuarterLength methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

Graph

class music21.graph.Graph(*args, **keywords)

An object representing a graph or plot, automating the creation and configuration of this graph in matplotlib. Graph objects do not manipulate Streams or other music21 data; they only manipulate raw data formatted for each Graph subclass. Numerous keyword arguments can be provided for configuration: alpha, colorBackgroundData, colorBackgroundFigure, colorGrid, title, doneAction, figureSize, colors, tickFontSize, titleFontSize, labelFontSize, fontFamily. The doneAction determines what happens after graph processing: either write a file (‘write’), open an interactive GUI browser (‘show’) or None (do processing but do not write output.

A base-class for basic setup of graphs, abstracting functionality provided by matplotlib. Optional keyword arguments: alpha, colorBackgroundData, colorBackgroundFigure, colorGrid, title, doneAction, figureSize, tickFontSize, titleFontSize, labelFontSize, fontFamily

>>> a = Graph(title='green')

Graph attributes

Attributes without Documentation: fontFamily, doneAction, title, colorBackgroundFigure, colors, tickFontSize, colorGrid, figureSize, colorBackgroundData, axisKeys, grid, titleFontSize, alpha, labelFontSize, data, dpi, axis

Graph methods

done(fp=None)
Implement the desired doneAction, after data processing
process()
process data and prepare plot
setAxisLabel(axisKey, label)
No documentation.
setAxisRange(axisKey, valueRange, pad=False)
No documentation.
setData(data)
No documentation.
setDoneAction(action)
No documentation.
setFigureSize(figSize)
Set the figure size as an x,y pair. Scales all graph components but not always all labels.
setTicks(axisKey, pairs)
paris are positions and labels
setTitle(title)
No documentation.
show()
Calls the show() method of the matplotlib plot. For most matplotlib back ends, this will open a GUI window with the desired graph.
write(fp=None)
Writes the graph to a file. If no file path is given, a temporary file is used.

Graph3DPolygonBars

Inherits from: Graph

class music21.graph.Graph3DPolygonBars(*args, **keywords)

Graph multiple parallel bar graphs in 3D. This draws bars with polygons, a temporary alternative to using Graph3DBars, above. Note: Due to matplotib issue Axis ticks do not seem to be adjustable without distorting the graph.

>>> from music21 import *
>>> g = graph.Graph3DPolygonBars()
>>> data = {1:[], 2:[], 3:[]}
>>> for i in range(len(data.keys())):
...    q = [(x, random.choice(range(10*(i+1)))) for x in range(20)]
...    data[data.keys()[i]] = q
>>> g.setData(data)
>>> g.process()
_images/Graph3DPolygonBars.png

Graph3DPolygonBars attributes

Attributes without Documentation: barWidth

Attributes inherited from Graph: fontFamily, doneAction, title, colorBackgroundFigure, colors, tickFontSize, colorGrid, figureSize, colorBackgroundData, axisKeys, grid, titleFontSize, alpha, labelFontSize, data, dpi, axis

Graph3DPolygonBars methods

process()
No documentation.

Methods inherited from Graph: done(), setAxisLabel(), setAxisRange(), setData(), setDoneAction(), setFigureSize(), setTicks(), setTitle(), show(), write()

GraphColorGrid

Inherits from: Graph

class music21.graph.GraphColorGrid(*args, **keywords)

Grid of discrete colored “blocks” to visualize results of a windowed analysis routine. Data is provided as a list of lists of colors, where colors are specified as a hex triplet, or the common HTML color codes, and based on analysis-specific mapping of colors to results.

>>> from music21 import *
>>> g = graph.GraphColorGrid()
>>> data = [['#55FF00', '#9b0000', '#009b00'], ['#FFD600', '#FF5600'], ['#201a2b', '#8f73bf', '#a080d5', '#403355', '#999999']]
>>> g.setData(data)
>>> g.process()
_images/GraphColorGrid.png

GraphColorGridLegend

Inherits from: Graph

class music21.graph.GraphColorGridLegend(*args, **keywords)

Grid of discrete colored “blocks” where each block can be labeled Data is provided as a list of lists of colors, where colors are specified as a hex triplet, or the common HTML color codes, and based on analysis-specific mapping of colors to results.

>>> from music21 import *
>>> g = graph.GraphColorGridLegend()
>>> data = []
>>> data.append(('Major', [('C#', '#00AA55'), ('D-', '#5600FF'), ('G#', '#2B00FF')]))
>>> data.append(('Minor', [('C#', '#004600'), ('D-', '#00009b'), ('G#', '#00009B')]))
>>> g.setData(data)
>>> g.process()
_images/GraphColorGridLegend.png

GraphHistogram

Inherits from: Graph

class music21.graph.GraphHistogram(*args, **keywords)

Graph the count of a single element. Data set is simply a list of x and y pairs, where there is only one of each x value, and y value is the count or magnitude of that value

>>> from music21 import *
>>> import random
>>> g = graph.GraphHistogram()
>>> data = [(x, random.choice(range(30))) for x in range(50)]
>>> g.setData(data)
>>> g.process()
_images/GraphHistogram.png

GraphHorizontalBar

Inherits from: Graph

class music21.graph.GraphHorizontalBar(*args, **keywords)

Numerous horizontal bars in discrete channels, where bars can be incomplete and/or overlap. Data provided is a list of pairs, where the first value becomes the key, the second value is a list of x-start, x-length values.

>>> from music21 import *
>>> a = graph.GraphHorizontalBar(doneAction='show')
>>> data = [('Chopin', [(1810, 1849-1810)]), ('Schumanns', [(1810, 1856-1810), (1819, 1896-1819)]), ('Brahms', [(1833, 1897-1833)])]
>>> a.setData(data)
>>> a.process()
_images/GraphHorizontalBar.png

GraphScatter

Inherits from: Graph

class music21.graph.GraphScatter(*args, **keywords)

Graph two parameters in a scatter plot. Data representation is a list of points of values.

>>> from music21 import *
>>> g = graph.GraphScatter()
>>> data = [(x, x*x) for x in range(50)]
>>> g.setData(data)
>>> g.process()
_images/GraphScatter.png

GraphScatterWeighted

Inherits from: Graph

class music21.graph.GraphScatterWeighted(*args, **keywords)

A scatter plot where points are scaled in size to represent the number of values stored within.

>>> from music21 import *
>>> g = graph.GraphScatterWeighted()
>>> data = [(23, 15, 234), (10, 23, 12), (4, 23, 5), (15, 18, 120)]
>>> g.setData(data)
>>> g.process()
_images/GraphScatterWeighted.png

Plot3DBars

Inherits from: PlotStream

class music21.graph.Plot3DBars(streamObj, *args, **keywords)

Base class for Stream plotting classes.

Plot3DBars attributes

Attributes without Documentation: format

Attributes inherited from PlotStream: values

Plot3DBars properties

Properties inherited from PlotStream: id

Plot3DBars methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotHistogram

Inherits from: PlotStream

class music21.graph.PlotHistogram(streamObj, *args, **keywords)

Base class for Stream plotting classes.

PlotHistogram attributes

Attributes without Documentation: format

Attributes inherited from PlotStream: values

PlotHistogram properties

Properties inherited from PlotStream: id

PlotHistogram methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotHorizontalBar

Inherits from: PlotStream

class music21.graph.PlotHorizontalBar(streamObj, *args, **keywords)

A graph of events, sorted by pitch, over time

PlotHorizontalBar attributes

Attributes without Documentation: format

Attributes inherited from PlotStream: values

PlotHorizontalBar properties

Properties inherited from PlotStream: id

PlotHorizontalBar methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotScatter

Inherits from: PlotStream

class music21.graph.PlotScatter(streamObj, *args, **keywords)

Base class for 2D Scatter plots.

PlotScatter attributes

Attributes without Documentation: format

Attributes inherited from PlotStream: values

PlotScatter properties

Properties inherited from PlotStream: id

PlotScatter methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotScatterWeighted

Inherits from: PlotStream

class music21.graph.PlotScatterWeighted(streamObj, *args, **keywords)

PlotScatterWeighted attributes

Attributes without Documentation: format

Attributes inherited from PlotStream: values

PlotScatterWeighted properties

Properties inherited from PlotStream: id

PlotScatterWeighted methods

Methods inherited from PlotStream: process(), remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength(), write()

PlotStream

class music21.graph.PlotStream(streamObj, flatten=True, *args, **keywords)

Approaches to plotting and graphing a stream. A base class from which Stream plotting Classes inherit.

Provide a Stream as an arguement. If flatten is True, the Stream will automatically be flattened.

PlotStream attributes

Attributes without Documentation: format, values

PlotStream properties

id
Each PlotStream has a unique id that consists of its format and a string that defines the parameters that are graphed.

PlotStream methods

process()
This will process all data, as well as call the done() method. What happens when the done() is called is determined by the the keyword argument doneAction; options are ‘show’ (display immediately), ‘write’ (write the file to a supplied file path), and None (do processing but do not write or show a graph).
remapQuarterLength(x)
Remap all quarter lengths.
show()
Call internal Graphs show() method independently of doneAction set and run with process()
ticksDynamics(minNameIndex=None, maxNameIndex=None)

Utility method to get ticks in dynamic values.

>>> from music21 import stream; s = stream.Stream()
>>> a = PlotStream(s)
>>> a.ticksDynamics()
[[0, '$pppppp$'], [1, '$ppppp$'], [2, '$pppp$'], [3, '$ppp$'], [4, '$pp$'], [5, '$p$'], [6, '$mp$'], [7, '$mf$'], [8, '$f$'], [9, '$fp$'], [10, '$sf$'], [11, '$ff$'], [12, '$fff$'], [13, '$ffff$'], [14, '$fffff$'], [15, '$ffffff$']]
>>> a.ticksDynamics(3,6)
[[3, '$ppp$'], [4, '$pp$'], [5, '$p$'], [6, '$mp$']]
ticksOffset(offsetMin=None, offsetMax=None, offsetStepSize=None, displayMeasureNumberZero=False, minMaxOnly=False, remap=False)

Get offset ticks. If Measures are found, they will be used to create ticks. If not, offsetStepSize will be used to create offset ticks between min and max. The remap parameter is not yet used. If minMaxOnly is True, only the first and last values will be provided.

>>> from music21 import corpus, stream, note
>>> s = corpus.parseWork('bach/bwv281.xml')
>>> a = PlotStream(s)
>>> a.ticksOffset() # on whole score, showing anacrusis spacing
[[1.0, '1'], [5.0, '2'], [9.0, '3'], [13.0, '4'], [17.0, '5'], [21.0, '6'], [25.0, '7'], [29.0, '8']]
>>> a = PlotStream(s.parts[0].flat) # on a Part
>>> a.ticksOffset() # on whole score, showing anacrusis spacing
[[1.0, '1'], [5.0, '2'], [9.0, '3'], [13.0, '4'], [17.0, '5'], [21.0, '6'], [25.0, '7'], [29.0, '8']]
>>> a.ticksOffset(8, 12, 2)
[[9.0, '3']]
>>> a = PlotStream(s.parts[0].flat) # on a Flat collection
>>> a.ticksOffset(8, 12, 2)
[[9.0, '3']]
>>> n = note.Note('a') # on a raw collection of notes with no measures
>>> s = stream.Stream()
>>> s.repeatAppend(n, 10)
>>> a = PlotStream(s) # on a Part
>>> a.ticksOffset() # on whole score
[[0, '0'], [10, '10']]
ticksPitchClass(pcMin=0, pcMax=11)

Utility method to get ticks in pitch classes

>>> from music21 import corpus
>>> s = corpus.parseWork('bach/bwv324.xml')
>>> a = PlotStream(s)
>>> [x for x,y in a.ticksPitchClass()]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
ticksPitchClassUsage(pcMin=0, pcMax=11, showEnharmonic=True, blankLabelUnused=True, hideUnused=False)

Get ticks and labels for pitch classes based on usage. That is, show the most commonly used enharmonic first.

>>> from music21 import corpus
>>> s = corpus.parseWork('bach/bwv324.xml')
>>> a = PlotStream(s)
>>> [x for x, y in a.ticksPitchClassUsage(hideUnused=True)]
[0, 2, 3, 4, 6, 7, 9, 11]
>>> s = corpus.parseWork('bach/bwv281.xml')
>>> a = PlotStream(s)
>>> [x for x, y in a.ticksPitchClassUsage(showEnharmonic=True, hideUnused=True)]
[0, 2, 3, 4, 5, 7, 9, 10, 11]
>>> [x for x, y in a.ticksPitchClassUsage(showEnharmonic=True, blankLabelUnused=False)]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
>>> s = corpus.parseWork('schumann/opus41no1/movement2.xml')
>>> a = PlotStream(s)
>>> [x for x, y in a.ticksPitchClassUsage(showEnharmonic=True)]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
ticksPitchSpaceChromatic(pitchMin=36, pitchMax=100)

Utility method to get ticks in pitch space values.

>>> from music21 import stream; s = stream.Stream()
>>> a = PlotStream(s)
>>> [x for x,y in a.ticksPitchSpaceChromatic(60,72)]
[60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72]
ticksPitchSpaceOctave(pitchMin=36, pitchMax=100)

Utility method to get ticks in pitch space only for every octave.

>>> from music21 import stream; s = stream.Stream()
>>> a = PlotStream(s)
>>> a.ticksPitchSpaceOctave()
[[36, 'C2'], [48, 'C3'], [60, 'C4'], [72, 'C5'], [84, 'C6'], [96, 'C7']]
ticksPitchSpaceUsage(pcMin=36, pcMax=72, showEnharmonic=False, blankLabelUnused=True, hideUnused=False)

Get ticks and labels for pitch space based on usage. That is, show the most commonly used enharmonic first.

>>> from music21 import corpus
>>> s = corpus.parseWork('bach/bwv324.xml')
>>> a = PlotStream(s[0])
>>> [x for x, y in a.ticksPitchSpaceUsage(hideUnused=True)]
[64, 66, 67, 69, 71, 72]
>>> s = corpus.parseWork('schumann/opus41no1/movement2.xml')
>>> a = PlotStream(s)
>>> [x for x, y in a.ticksPitchSpaceUsage(showEnharmonic=True, hideUnused=True)]
[36, 38, 40, 41, 43, 44, 45, 47, 48, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72]
ticksQuarterLength(min=0.25, max=4, remap=True)

Get ticks for quarterLength. If remap is True, the remapQuarterLength() function will be used to scale displayed quarter lengths by log base 2.

>>> from music21 import stream; s = stream.Stream()
>>> a = PlotStream(s)
write(fp=None)
Call internal Graphs write() method independently of doneAction set and run with process()

PlotWindowedAnalysis

Inherits from: PlotStream

class music21.graph.PlotWindowedAnalysis(streamObj, processor=None, *args, **keywords)

Base Plot for windowed analysis routines.

PlotWindowedAnalysis attributes

Attributes without Documentation: format

Attributes inherited from PlotStream: values

PlotWindowedAnalysis properties

Properties inherited from PlotStream: id

PlotWindowedAnalysis methods

process()
Process method here overridden to provide legend.
write(fp=None)
Process method here overridden to provide legend.

Methods inherited from PlotStream: remapQuarterLength(), show(), ticksDynamics(), ticksOffset(), ticksPitchClass(), ticksPitchClassUsage(), ticksPitchSpaceChromatic(), ticksPitchSpaceOctave(), ticksPitchSpaceUsage(), ticksQuarterLength()