Input argument must be a cell array of character vectors. Only one input argument is supported for cell arrays. Sorting direction must be ''ascend'' or ''descend''. Sorting direction must be ''ascend'', ''descend'', ''monotonic'', ''strictascend'', ''strictdescend'', or ''strictmonotonic''. SORT on complex integers is not supported. ''ComparisonMethod'' parameter not supported when first argument is a {0} array. ''ComparisonMethod'' value must be ''auto'', ''abs'', or ''real''. ''MissingPlacement'' parameter not supported when first argument is a {0} array. ''MissingPlacement'' value must be ''auto'', ''first'', or ''last''. Parameter name must be 'ComparisonMethod' or 'MissingPlacement'. Incorrect number of arguments. Parameter names and values must occur in pairs. Dimension argument must be a positive integer. Second argument must specify a dimension or a sorting direction. Sorting direction must be a character vector.