Unrecognized flag ''{0}''. Valid flags are ''rows'', ''stable'', ''sorted'', ''legacy''. Invalid input. Valid flags are ''rows'', ''stable'', ''sorted'', ''legacy''. You cannot specify the ''{0}'' flag more than once. You can specify either ''sorted'' or ''stable'' but not both. You can specify either ''legacy'' or ''R2012a'' but not both. The ''legacy'' flag must come last. The ''R2012a'' flag must come last. You cannot specify ''stable'' and ''sorted'' with ''legacy'' and ''R2012a''. A and B must be vectors or ''rows'' must be specified. Inputs A and B must be matrices with the same number of columns in the ''rows'' case. The ''rows'' input is not supported for cell array inputs. Input A of class {0} and input B of class {1} must be the same class, unless one is double. Inputs A and B must be matrices with the same number of columns in the ''rows'' case. Input A of class {0} and input B of class {1} must be cell arrays of character vectors, unless one is a character vector.