Copy values from `x` into `y`.

Copy values from x into y.

Copy values from a one-dimensional double-precision floating-point ndarray `x` into a one-dimensional double-precision floating-point ndarray `y`.

Copy values from a one-dimensional single-precision floating-point ndarray `x` into a one-dimensional single-precision floating-point ndarray `y`.

Copy values from a one-dimensional single-precision complex floating-point ndarray `x` into a one-dimensional single-precision complex floating-point ndarray `y`.

Copy values from a one-dimensional ndarray `x` into a one-dimensional ndarray `y`.