The percent sign, %, can be used in the matlab code to add explanatory information to the code. Similarly, we can add explanatory information to a dataset array, by using the dataset array properties. The set function can be used to assign values to the dataset property, and the get function can be used to access these information.
DS=dataset(...) % a dataset array is constructed
DS=set(DS, 'Description', 'Whatever can describe the dataset can be put here');
get(DS) % show dataset array properties
summary(DS) % also show dataset array properties
The 'Description' can be replaced with other properties which are displayed by the get function.