First argument must be a 2-dimensional matrix. COL must be numeric. Column sorting vector must contain integers with absolute value between 1 and the number of columns in the first argument. Some cells in X contain non-scalar values and cannot be sorted. Sorting direction must be ''ascend'' or ''descend''. DIR option must be a Character Vector, Cell Character Vector or String array. DIR option must be of the same size as COL. DIR option must be a scalar if used as second argument. ''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. 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. Second argument must specify a column sorting vector or sorting direction. Sorting direction must be a character vector or cell array of character vectors.