music21.graph.findPlot

Functions that find appropriate plots for graph.plot.

Functions

music21.graph.findPlot.axisMatchesValue(axisClass: Type[Axis] | Axis, axisValue: str) → bool

Returns Bool about whether axisValue.lower() is anywhere in axisClass.quantities

>>> ax = graph.axis.CountingAxis
>>> graph.findPlot.axisMatchesValue(ax, 'counting')
True
>>> graph.findPlot.axisMatchesValue(ax, 'count')
True
>>> graph.findPlot.axisMatchesValue(ax, 'offset')
False

Works on an instantiated object as well:

>>> ax = graph.axis.CountingAxis()
>>> graph.findPlot.axisMatchesValue(ax, 'counting')
True
>>> graph.findPlot.axisMatchesValue(ax, 'flute')
False

Changed in v.8 – Must send a subclass of axis.Axis or an instance.

None is no longer supported.

music21.graph.findPlot.getAxisClassFromValue(axisValue: str) → Type[Axis] | None

given an axis value return the single best axis for the value, or None

uses Axis.quantities

>>> getAxis = graph.findPlot.getAxisClassFromValue

>>> getAxis('counting')
<class 'music21.graph.axis.CountingAxis'>

>>> getAxis('pc')
<class 'music21.graph.axis.PitchClassAxis'>

>>> print(getAxis('boogie'))
None

music21.graph.findPlot.getAxisClasses() → List[Type[Axis]]

return a list of all Axis subclasses… returns sorted list by name

>>> graph.findPlot.getAxisClasses()
[<class 'music21.graph.axis.Axis'>,
 <class 'music21.graph.axis.CountingAxis'>,
 <class 'music21.graph.axis.DynamicsAxis'>,
 <class 'music21.graph.axis.OffsetAxis'>,
 ...]

music21.graph.findPlot.getAxisQuantities(synonyms=False, axesToCheck=None)

>>> graph.findPlot.getAxisQuantities()
['generic', 'count', 'dynamic', 'offset', 'offsetEnd',
 'pitchGeneric', 'pitchClass', 'pitchSpace', 'octave', 'position', 'quarterLength']

>>> graph.findPlot.getAxisQuantities(synonyms=True)
['generic', 'one', 'nothing', 'blank', 'count', 'quantity', 'frequency', ...]

>>> theseAxes = [graph.axis.CountingAxis, graph.axis.OffsetAxis]
>>> graph.findPlot.getAxisQuantities(axesToCheck=theseAxes)
['count', 'offset']

>>> graph.findPlot.getAxisQuantities(True, axesToCheck=theseAxes)
['count', 'quantity', 'frequency', 'counting',
 'offset', 'measure', 'offsets', 'measures', 'time']

music21.graph.findPlot.getPlotClasses() → List[Type[PlotStreamMixin]]

return a list of all PlotStreamMixin subclasses… returns sorted list by name

>>> graph.findPlot.getPlotClasses()
[<class 'music21.graph.plot.Dolan'>,
 <class 'music21.graph.plot.Features'>,
 <class 'music21.graph.plot.Histogram'>,
 <class 'music21.graph.plot.HistogramPitchClass'>,
 <class 'music21.graph.plot.HistogramPitchSpace'>,
 ...]

music21.graph.findPlot.getPlotClassesFromFormat(graphFormat, checkPlotClasses=None)

Given a graphFormat, find a list of plots that match:

>>> graph.findPlot.getPlotClassesFromFormat('scatterweighted')
[<class 'music21.graph.plot.ScatterWeighted'>,
 <class 'music21.graph.plot.ScatterWeightedPitchClassQuarterLength'>,
 <class 'music21.graph.plot.ScatterWeightedPitchSpaceDynamicSymbol'>,
 <class 'music21.graph.plot.ScatterWeightedPitchSpaceQuarterLength'>]

Or give a list of plot classes to check:

>>> pcs = [graph.plot.ScatterWeighted, graph.plot.Dolan]
>>> graph.findPlot.getPlotClassesFromFormat('scatterweighted', pcs)
[<class 'music21.graph.plot.ScatterWeighted'>]

music21.graph.findPlot.getPlotsToMake(graphFormat: str | None = None, xValue=None, yValue=None, zValue=None)

Returns either a list of plot classes to make if there is a predetermined class

or a list of tuples where the first element of each tuple is the plot class and the second is a dict of {‘x’: axisXClass, ‘y’: axisYClass} etc.

Default is pianoroll

>>> graph.findPlot.getPlotsToMake()
[<class 'music21.graph.plot.HorizontalBarPitchSpaceOffset'>]

>>> graph.findPlot.getPlotsToMake('scatter')
[<class 'music21.graph.plot.Scatter'>,
 <class 'music21.graph.plot.ScatterPitchClassOffset'>,
 <class 'music21.graph.plot.ScatterPitchClassQuarterLength'>,
 <class 'music21.graph.plot.ScatterPitchSpaceDynamicSymbol'>,
 <class 'music21.graph.plot.ScatterPitchSpaceQuarterLength'>]

>>> graph.findPlot.getPlotsToMake('scatter', 'offset', 'pitchClass')
[<class 'music21.graph.plot.ScatterPitchClassOffset'>]

Try in wrong order:

>>> graph.findPlot.getPlotsToMake('scatter', 'pitchClass', 'offset')
[<class 'music21.graph.plot.ScatterPitchClassOffset'>]

Try giving just one value:

>>> graph.findPlot.getPlotsToMake('scatter', 'offset')
[<class 'music21.graph.plot.ScatterPitchClassOffset'>]

>>> graph.findPlot.getPlotsToMake('scatter', 'ql')  # abbreviation
[<class 'music21.graph.plot.ScatterPitchClassQuarterLength'>,
 <class 'music21.graph.plot.ScatterPitchSpaceQuarterLength'>]

Just one value, but it is in the wrong axis…

>>> graph.findPlot.getPlotsToMake('scatter', 'pitchClass')
[<class 'music21.graph.plot.ScatterPitchClassOffset'>,
 <class 'music21.graph.plot.ScatterPitchClassQuarterLength'>]

Create a graph that does not exist:

>>> graph.findPlot.getPlotsToMake('scatter', 'offset', 'dynamics')
[(<class 'music21.graph.plot.Scatter'>,
  OrderedDict([('x', <class 'music21.graph.axis.OffsetAxis'>),
               ('y', <class 'music21.graph.axis.DynamicsAxis'>)]))]

Just a couple of values:

>>> graph.findPlot.getPlotsToMake('offset', 'dynamics')
[(<class 'music21.graph.plot.Scatter'>,
  OrderedDict([('x', <class 'music21.graph.axis.OffsetAxis'>),
               ('y', <class 'music21.graph.axis.DynamicsAxis'>)]))]

Just one value:

>>> graph.findPlot.getPlotsToMake('octave')
[(<class 'music21.graph.plot.Histogram'>,
  OrderedDict([('x', <class 'music21.graph.axis.PitchSpaceOctaveAxis'>)]))]

Three values:

>>> graph.findPlot.getPlotsToMake('offset', 'dynamics', 'count')
[(<class 'music21.graph.plot.ScatterWeighted'>,
  OrderedDict([('x', <class 'music21.graph.axis.OffsetAxis'>),
               ('y', <class 'music21.graph.axis.DynamicsAxis'>),
               ('z', <class 'music21.graph.axis.CountingAxis'>)]))]

music21.graph.findPlot.userFormatsToFormat(userFormat)

Replace possible user format strings with defined format names as used herein. Returns string unaltered if no match.

>>> graph.findPlot.userFormatsToFormat('horizontal')
'horizontalbar'
>>> graph.findPlot.userFormatsToFormat('Weighted Scatter')
'scatterweighted'
>>> graph.findPlot.userFormatsToFormat('3D')
'3dbars'

Unknown formats pass through unaltered.

>>> graph.findPlot.userFormatsToFormat('4D super chart')
'4dsuperchart'