atan2 expected 2 arguments, got 1

This error message typically occurs in programming languages that have a function called "atan2", such as Python or MATLAB. The "atan2" function calculates the arctangent of two numbers, where the two arguments represent the y and x coordinates of a point in a Cartesian plane.

The error message "atan2 expected 2 arguments, got 1" means that the "atan2" function was called with only one argument, instead of the required two. This could happen if the programmer forgot to provide one of the arguments, or if there was a mistake in the code that caused one of the arguments to be omitted.

To fix this error, the programmer should check the code where the "atan2" function is called, and make sure that it is being called with two arguments that represent the coordinates of a point.