Input arguments for contours must be full. Input arguments for contours must be real. Use the function REAL to get the real part of the inputs. Input arguments for contours must have at most 2 dimensions. X must be a vector or a matrix. Y must be a vector or a matrix. The error argument from {0} has been set to the empty matrix. This will become an error in a future release. The error output argument from {0} is deprecated. This will no longer be supported in a future release.