y-coordinates, specified as a scalar, vector,
matrix, or multidimensional array. Inputs Y and X must
either be the same size or have sizes that are compatible (for example, Y is
an M-by-N matrix and X is
a scalar or 1-by-N row vector).
For more information, see Compatible Array Sizes for Basic Operations.

x-coordinates, specified as a scalar, vector,
matrix, or multidimensional array. Inputs Y and X must
either be the same size or have sizes that are compatible (for example, Y is
an M-by-N matrix and X is
a scalar or 1-by-N row vector).
For more information, see Compatible Array Sizes for Basic Operations.

The four-quadrant inverse tangent, atan2d(Y,X),
returns values in the closed interval [-180,180] based
on the values of Y and X as
shown in the graphic.

In contrast, atand(Y/X) returns results that
are limited to the interval [-90,90], shown on
the right side of the diagram.

Tall Array Support

This function fully supports tall arrays. For
more information, see Tall Arrays.