Create README.md

In this release one can find matlab codes for n-ary TOPSIS
 that uses n-ary norm operators to set preference for either positive
 ideal solution or negative ideal solution depending on the practical
 problem. Basic TOPSIS has been critized about not being able to set
 preference for either positive ideal solution or negative ideal solution
 and it is considering them to be equally important. With n-ary norm operator
 we can prefer one over another depending on the practical problem. 
 Preference can be modelled by imposing stricter or weaker norm operator 
 depending on practical problem. Another generalization in the code is that
 instead of using Euclidean distance code is generalized to Minkowski distance.
 Paper was this published in

 P. Luukka, N—ary norm operators and TOPSIS, 2020 IEEE International 
 Conference on Fuzzy Systems (FUZZ-IEEE), Glasgow, UK, 2020, pp. 1-6, 
 doi: 10.1109/FUZZ48607.2020.9177580.

Codes that can be found are:
Mainfile.m script that shows an example how to use the method
narytopsis.m function call for N-ary TOPSIS
normalization.m function that normalizes the data into unit interval
distM.m function that calculates Minkowski distance
recursivetnorm.m and recursivetconorm.m recursive implementation for intersection and union operators
i_yager.m, u_yager.m implementations for Yager's intersection and union operators.

Author: luukka76

README.md

@@ -0,0 +1,16 @@
+# Preference-modeling-with-TOPSIS-using-N-ary-norm-operators
+ In this release one can find matlab codes for n-ary TOPSIS
+ that uses n-ary norm operators to set preference for either positive
+ ideal solution or negative ideal solution depending on the practical
+ problem. Basic TOPSIS has been critized about not being able to set
+ preference for either positive ideal solution or negative ideal solution
+ and it is considering them to be equally important. With n-ary norm operator
+ we can prefer one over another depending on the practical problem. 
+ Preference can be modelled by imposing stricter or weaker norm operator 
+ depending on practical problem. Another generalization in the code is that
+ instead of using Euclidean distance code is generalized to Minkowski distance.
+ Paper was this published in
+
+ P. Luukka, N—ary norm operators and TOPSIS, 2020 IEEE International 
+ Conference on Fuzzy Systems (FUZZ-IEEE), Glasgow, UK, 2020, pp. 1-6, 
+ doi: 10.1109/FUZZ48607.2020.9177580.