Process Lists of mixed data types by finding intersections, making unique, IDing ^{Share & earn cash}

%By Chukwunomso Agunwamba

##These mathematical codes are provided as is, for the end user to be able to use them
##and to edit them for educational purposes. However, any modified version must  
##include my name as the original producer of the code.

%Find the intersection of a and b: AB is logically showing the intersections.  
%a runs down the columns of AB and b runs along the rows of AB.
%opa and opb are the intersctions made unique after indexing in a,
%or in b respectively.
%upa and upb are the intersctions listed as frequently as they are present, and
%after indexing in a, or in b respectively. This is with mixed data types  
%allowed. Note that unique.m rigidly does not allow mixing input data types.

%By Chukwunomso Agunwamba
%makeunique.m makes unique list of numerical vectors or strings,
%with mixed data types allowed. Note that unique.m rigidly does not allow mixing
%input data types.

%By Chukwunomso Agunwamba

%Not case sensitive method of converting input data of strings to a numerical ID.