matplotlib.axes.Axes.magnitude_spectrum   Axes.magnitude_spectrum(x, Fs=None, Fc=None, window=None, pad_to=None, sides=None, scale=None, *, data=None, **kwargs)[source]
 
Plot the magnitude spectrum. Compute the magnitude spectrum of x. Data is padded to a length of pad_to and the windowing function window is applied to the signal.  Parameters 
 
x1-D array or sequence


Array or sequence containing the data.  
Fsfloat, default: 2


The sampling frequency (samples per time unit). It is used to calculate the Fourier frequencies, freqs, in cycles per time unit.  
windowcallable or ndarray, default: window_hanning


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. 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'}, optional


Which sides of the spectrum to return. 'default' is one-sided for real data and two-sided for complex data. 'onesided' forces the return of a one-sided spectrum, while 'twosided' forces two-sided.  
pad_toint, optional


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).  
scale{'default', 'linear', 'dB'}


The scaling of the values in the spec. 'linear' is no scaling. 'dB' returns the values in dB scale, i.e., the dB amplitude (20 * log10). 'default' is 'linear'.  
Fcint, default: 0


The center frequency of x, which offsets the x extents of the plot to reflect the frequency range used when a signal is acquired and then filtered and downsampled to baseband.    Returns 
 
spectrum1-D array


The values for the magnitude spectrum before scaling (real valued).  
freqs1-D array


The frequencies corresponding to the elements in spectrum.  
lineLine2D


The line created by this function.    Other Parameters 
 
dataindexable object, optional


If given, the following parameters also accept a string s, which is interpreted as data[s] (unless this raises an exception): x  **kwargs

Keyword arguments control the Line2D properties:   
Property Description   
agg_filter a filter function, which takes a (m, n, 3) float array and a dpi value, and returns a (m, n, 3) array  
alpha scalar or None  
animated bool  
antialiased or aa bool  
clip_box Bbox  
clip_on bool  
clip_path Patch or (Path, Transform) or None  
color or c color  
dash_capstyle CapStyle or {'butt', 'projecting', 'round'}  
dash_joinstyle JoinStyle or {'miter', 'round', 'bevel'}  
dashes sequence of floats (on/off ink in points) or (None, None)  
data (2, N) array or two 1D arrays  
drawstyle or ds {'default', 'steps', 'steps-pre', 'steps-mid', 'steps-post'}, default: 'default'  
figure Figure  
fillstyle {'full', 'left', 'right', 'bottom', 'top', 'none'}  
gid str  
in_layout bool  
label object  
linestyle or ls {'-', '--', '-.', ':', '', (offset, on-off-seq), ...}  
linewidth or lw float  
marker marker style string, Path or MarkerStyle  
markeredgecolor or mec color  
markeredgewidth or mew float  
markerfacecolor or mfc color  
markerfacecoloralt or mfcalt color  
markersize or ms float  
markevery None or int or (int, int) or slice or list[int] or float or (float, float) or list[bool]  
path_effects AbstractPathEffect  
picker float or callable[[Artist, Event], tuple[bool, dict]]  
pickradius float  
rasterized bool  
sketch_params (scale: float, length: float, randomness: float)  
snap bool or None  
solid_capstyle CapStyle or {'butt', 'projecting', 'round'}  
solid_joinstyle JoinStyle or {'miter', 'round', 'bevel'}  
transform unknown  
url str  
visible bool  
xdata 1D array  
ydata 1D array  
zorder float        See also  psd

Plots the power spectral density.  angle_spectrum

Plots the angles of the corresponding frequencies.  phase_spectrum

Plots the phase (unwrapped angle) of the corresponding frequencies.  specgram

Can plot the magnitude spectrum of segments within the signal in a colormap.