1. A method for dispersed storage error encoding data by a computing device, the method comprises: generating a data matrix from the data, wherein the data matrix includes a plurality of columns and a plurality of rows, a column of the plurality of columns is based on data size and a row of the plurality of rows is based on a data grouping; generating a chunkset data matrix from one or more rows of the data matrix; and matrix multiplying the chunkset data matrix by an encoding matrix to produce a chunkset slice matrix, wherein a row of the chunkset slice matrix corresponds to an encoded data slice and wherein the plurality of rows of the chunkset slice matrix corresponds to a set of encoded data slices, wherein a decode threshold number of encoded data slices of the set of encoded data slices is needed to recover the data grouping associated with the one or more rows of the data matrix.