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librosa.display.FJSFormatter

class librosa.display.FJSFormatter(*, fmin, n_bins, bins_per_octave, intervals, major=True, unison=None, unicode=True)

Ticker formatter for Functional Just System (FJS) notation

Parameters:

fminfloat

The unison frequency for this axis

intervalsstr or array of float in [1, 2)

The interval specification for the frequency axis.

See core.interval_frequencies for supported values.

majorbool

If True, ticks are always labeled.

If False, ticks are only labeled if the span is less than 2 octaves

unisonstr

The unison note name. If not provided, it will be inferred from fmin.

unicodebool

If True, use unicode symbols for accidentals.

If False, use ASCII symbols for accidentals.

See also

NoteFormatter

hz_to_fjs

matplotlib.ticker.Formatter

Examples

>>> import matplotlib.pyplot as plt
>>> values = librosa.midi_to_hz(np.arange(48, 72))
>>> fig, ax = plt.subplots(nrows=2)
>>> ax[0].bar(np.arange(len(values)), values)
>>> ax[0].set(ylabel='Hz')
>>> ax[1].bar(np.arange(len(values)), values)
>>> ax[1].yaxis.set_major_formatter(librosa.display.NoteFormatter())
>>> ax[1].set(ylabel='Note')

__init__(*, fmin, n_bins, bins_per_octave, intervals, major=True, unison=None, unicode=True)

Methods

__init__(*, fmin, n_bins, bins_per_octave, ...)
create_dummy_axis(**kwargs)
fix_minus(s)	Some classes may want to replace a hyphen for minus with the proper Unicode symbol (U+2212) for typographical correctness. This is a helper method to perform such a replacement when it is enabled via :rc:`axes.unicode_minus`.
format_data(value)	Return the full string representation of the value with the position unspecified.
format_data_short(value)	Return a short string version of the tick value.
format_ticks(values)	Return the tick labels for all the ticks at once.
get_offset()
set_axis(axis)
set_locs(locs)	Set the locations of the ticks.

Attributes

axis
locs