Axes.
angle_spectrum
(x, Fs=None, Fc=None, window=None, pad_to=None, sides=None, **kwargs)¶Plot the angle spectrum.
Call signature:
angle_spectrum(x, Fs=2, Fc=0, window=mlab.window_hanning,
pad_to=None, sides='default', **kwargs)
Compute the angle spectrum (wrapped phase spectrum) of x. Data is padded to a length of pad_to and the windowing function window is applied to the signal.
- x: 1-D array or sequence
- Array or sequence containing the data
Keyword arguments:
- Fs: scalar
- The sampling frequency (samples per time unit). It is used to calculate the Fourier frequencies, freqs, in cycles per time unit. The default value is 2.
- window: callable or ndarray
- A function or a vector of length NFFT. To create window vectors see
window_hanning()
,window_none()
,numpy.blackman()
,numpy.hamming()
,numpy.bartlett()
,scipy.signal()
,scipy.signal.get_window()
, etc. The default iswindow_hanning()
. If a function is passed as the argument, it must take a data segment as an argument and return the windowed version of the segment.- sides: [ ‘default’ | ‘onesided’ | ‘twosided’ ]
- Specifies which sides of the spectrum to return. Default gives the default behavior, which returns one-sided for real data and both for complex data. ‘onesided’ forces the return of a one-sided spectrum, while ‘twosided’ forces two-sided.
The number of points to which the data segment is padded when performing the FFT. While not increasing the actual resolution of the spectrum (the minimum distance between resolvable peaks), this can give more points in the plot, allowing for more detail. This corresponds to the n parameter in the call to fft(). The default is None, which sets pad_to equal to the length of the input signal (i.e. no padding).
Returns the tuple (spectrum, freqs, line):
- spectrum: 1-D array
- The values for the angle spectrum in radians (real valued)
- freqs: 1-D array
- The frequencies corresponding to the elements in spectrum
- line: a
Line2D
instance- The line created by this function
kwargs control the Line2D
properties:
Property Description agg_filter
unknown alpha
float (0.0 transparent through 1.0 opaque) animated
[True | False] antialiased
or aa[True | False] axes
an Axes
instancebottom_margin
unknown clip_box
a matplotlib.transforms.Bbox
instanceclip_on
[True | False] clip_path
[ ( Path
,Transform
) |Patch
| None ]color
or cany matplotlib color contains
a callable function dash_capstyle
[‘butt’ | ‘round’ | ‘projecting’] dash_joinstyle
[‘miter’ | ‘round’ | ‘bevel’] dashes
sequence of on/off ink in points drawstyle
[‘default’ | ‘steps’ | ‘steps-pre’ | ‘steps-mid’ | ‘steps-post’] figure
a matplotlib.figure.Figure
instancefillstyle
[‘full’ | ‘left’ | ‘right’ | ‘bottom’ | ‘top’ | ‘none’] gid
an id string label
string or anything printable with ‘%s’ conversion. left_margin
unknown linestyle
or ls[‘solid’ | ‘dashed’, ‘dashdot’, ‘dotted’ | (offset, on-off-dash-seq) | '-'
|'--'
|'-.'
|':'
|'None'
|' '
|''
]linewidth
or lwfloat value in points margins
unknown marker
A valid marker style
markeredgecolor
or mecany matplotlib color markeredgewidth
or mewfloat value in points markerfacecolor
or mfcany matplotlib color markerfacecoloralt
or mfcaltany matplotlib color markersize
or msfloat markevery
[None | int | length-2 tuple of int | slice | list/array of int | float | length-2 tuple of float] path_effects
unknown picker
float distance in points or callable pick function fn(artist, event)
pickradius
float distance in points rasterized
[True | False | None] right_margin
unknown sketch_params
unknown snap
unknown solid_capstyle
[‘butt’ | ‘round’ | ‘projecting’] solid_joinstyle
[‘miter’ | ‘round’ | ‘bevel’] top_margin
unknown transform
a matplotlib.transforms.Transform
instanceurl
a url string visible
[True | False] xdata
1D array ydata
1D array zorder
any number
Example:
(Source code, png, pdf)
See also
magnitude_spectrum()
angle_spectrum()
plots the magnitudes of the
corresponding frequencies.phase_spectrum()
phase_spectrum()
plots the unwrapped version of this
function.specgram()
specgram()
can plot the angle spectrum of segments
within the signal in a colormap.Notes
In addition to the above described arguments, this function can take a data keyword argument. If such a data argument is given, the following arguments are replaced by data[<arg>]: