PlotPoints

PlotPoints
is an option for plotting functions that specifies how many initial sample points to use.

With a single variable, PlotPoints->n specifies the total number of initial sample points to use.

With more than one variable, PlotPoints->n specifies that n initial points should be used in each direction.

PlotPoints->{n₁, n₂, ...} specifies different numbers of initial sample points for each successive direction.

Adaptive procedures controlled by MaxRecursion are used to choose more sample points.

Use 10 points in each direction:

MaxRecursion will cause additional sampling beyond the initial 10 points:

Use 50 points along the

direction:

Use different numbers of points for different variables: