StreamPoints

is an option to StreamPlot, ListStreamPlot, and related functions that determines how many streamlines to draw.

Details

	None	draw no streamlines
	n	draw at most n streamlines
	Automatic	automatically chosen streamlines
	Coarse	automatically chosen coarse set of streamlines
	Fine	automatically chosen fine set of streamlines
	{p₁,p₂,…}	draw streamlines through the points p₁, p₂, …
	{{p₁,g₁},…}	draw streamlines through p_i using graphics directive g_i
	{spec,d}	specify a minimum distance between streamlines
	{spec,{d_start,d_end}}	specify minimum distances at start and end
	{spec,dspec,len}	specify a maximum length for any streamline

When explicit initial points are given in the form {p₁,p₂,…}, StreamPlot and related functions effectively follow the flow of the vector field forward and backward from each point.
In the form {spec,d}, the minimum distance d between streamlines is given in ordinary coordinates, and applies in all directions.
In the form {spec,d,len}, len gives the total length of the streamlines to generate forward and backward from each explicit initial point specified. The length len is measured in ordinary coordinates.
The parameters d and len can be specified in the form Scaled[s], representing a fraction of the diagonal of the whole plot.

Examples

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Use different numbers of streamlines:

Specify streamlines that go through a set of seed points:

Use both automatic and explicit seeding with styles for explicitly seeded streamlines:

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