Input must be a character vector expression, function name, function handle, or INLINE object. {0} cannot be plotted in the xy-plane. ezplot requires numeric values for {0} Cannot plot parameterized surfaces. Try ezsurf. The input character vector must be an expression. Implicit functions of a single variable are not supported. Cannot plot {0}: This function has no real values. Function failed to evaluate on array inputs; vectorizing the function may speed up its evaluation and avoid the need to loop over array elements.