The length of the DCT-I transform must be greater than 1. Use a longer transform length or a different variant of the DCT. The length of the DCT-I transform must be greater than 1 in every dimension. Use a longer transform length or a different variant of the DCT. Transform length must be a nonnegative integer scalar. Unrecognized option; specify the transform type with 'Variant' followed by an integer between 1 and 4. Transform variant must be an integer scalar between 1 and 4. Transform output size must have at least NDIMS elements. Transform output size must be a real integer row vector. Transform output size vector must contain non-negative integers. If you specify MROWS, you also have to specify NCOLS. Invalid data type. First argument must be double, single, int8, uint8, int16, uint16, int32, uint32, or logical. Sparse arrays are not supported.