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• Python Control Systems Library

control.phaseplot.streamplot — Python Control Systems Library 0.10.2 documentation

control.phaseplot.streamplot(sys, pointdata, gridspec=None, zorder=None, ax=None, vary_color=False, vary_linewidth=False, cmap=None, norm=None, suppress_warnings=False, _check_kwargs=True, **kwargs)[source]

Plot streamlines in the phase plane.

This function plots the streamlines for a two-dimensional state space system using the matplotlib.axes.Axes.streamplot function.

Parameters:

sysNonlinearIOSystem or callable(t, x, …)

I/O system or function used to generate phase plane data. If a function is given, the remaining arguments are drawn from the params keyword.

pointdatalist or 2D array

List of the form [xmin, xmax, ymin, ymax] describing the boundaries of the phase plot.

gridspeclist, optional

Specifies the size of the grid in the x and y axes on which to generate points.

paramsdict or list, optional

Parameters to pass to system. For an I/O system, params should be a dict of parameters and values. For a callable, params should be dict with key ‘args’ and value given by a tuple (passed to callable).

colormatplotlib color spec, optional

Plot the vector field in the given color.

axmatplotlib.axes.Axes, optional

Use the given axes for the plot, otherwise use the current axes.

Returns:

outStreamplotSet

Containter object with lines and arrows contained in the streamplot. See matplotlib.axes.Axes.streamplot for details.

Other Parameters:

cmapstr or Colormap, optional

Colormap to use for varying the color of the streamlines.

normmatplotlib.colors.Normalize, optional

Normalization map to use for scaling the colormap and linewidths.

rcParamsdict

Override the default parameters used for generating plots. Default is set by config.default['ctrlplot.rcParams'].

suppress_warningsbool, optional

If set to True, suppress warning messages in generating trajectories.

vary_colorbool, optional

If set to True, vary the color of the streamlines based on the magnitude of the vector field.

vary_linewidthbool, optional.

If set to True, vary the linewidth of the streamlines based on the magnitude of the vector field.

zorderfloat, optional

Set the zorder for the streamlines. In not specified, it will be automatically chosen by matplotlib.axes.Axes.streamplot.

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