Input array must be a vector or matrix. Complex integers are not supported. Cell arrays must contain character vectors. Number of rows to return must be a nonnegative integer. Column sorting vector must contain positive integers between 1 and the number of columns in the first argument. Sorting direction must be ''descend'' or ''ascend''. Sorting direction must specify one direction or a direction for each column in the first argument. Sorting direction must specify one direction or a direction for each element of the column sorting vector. Third argument must specify a column sorting vector or sorting direction. Sorting direction must be a character vector or cell array of character vectors. ''ComparisonMethod'' parameter only supported when input array is numeric or logical. ''ComparisonMethod'' value must be ''auto'', ''abs'', or ''real''. Parameter name must be 'ComparisonMethod'. Incorrect number of input arguments. Parameter names and values must occur in pairs. Invalid data type. First argument must be a numeric, logical, categorical, or character array, or character cell array. For code generation, cell array inputs to 'topkrows' are not supported.