utils - Utility functions

Quaternion specific operations

sympSplit(q)	Splits a quaternion array into two complex arrays.
sympSynth(q_1, q_2)	Constructs a quaternion array from two complex arrays.
StokesNorm(q)	Return the Stokes-Poincaré norm of a quaternion.
normalizeStokes(S0, S1, S2, S3[, tol])	Normalize Stokes parameters S1, S2, S3 by S0.
Stokes2geo(S0, S1, S2, S3[, tol])	Return geometric parameters from Stokes parameters.
geo2Stokes(a, theta, chi[, Phi])	Compute Stokes parameters from geometric parameters.
quat2euler(q)	Euler polar form of a quaternion array.
euler2quat(a, theta, chi, phi)	Quaternion from Euler polar form.

Windows functions

class bispy.utils.windows

Windows functions static methods.

These window functions are provided for convenience, and are meant to be used with the QSTFT class.

Methods

gaussian(N[, sigma])	Gaussian window
hamming(N)	Hamming window
hanning(N)	Hanning window
rectangle(N)	Rectangle window

Graphical tools

class bispy.utils.visual

Static methods for visualization of bivariate signals.

Methods

plot2D(t, q[, labels])	2D plot of a bivariate signal.
plot3D(t, q)	3D plot of a bivariate signal

static plot2D(t, q, labels=['u(t)', 'v(t)'])

2D plot of a bivariate signal.

Plots the 2D trace, and time evolution of each component.

Parameters:

t, qarray_type

time and signal arrays (signal array may be either complex or quaternion type)

labels[label1, label2]

list of labels to display.

Returns:

fig, axfigure and axis handles

static plot3D(t, q)

3D plot of a bivariate signal

Parameters:

t, qarray_type

time and signal arrays (signal array may be either complex or quaternion type)

Returns:

fig, axfigure and axis handles