Concise way to remove columns of a matrix with at least 2 repeating values in separate rows

Hello again,

I am currently trying to find an elegant way to code in a function that would remove columns based on repeating values in at least 2 rows in that one column. I have read about "unique" function but i'm not certain how to code in all the arguments so i'm getting what i wanted. I have made a graphic example of what i would like to achieve below.

This is just an example of a matrix with 3 rows but ultimately i want to have this option be realisable for N number of rows so it can't be fixed.

Best regards and thank you for any help,

Answer 1

[Matt J]

One possibilty,

A =[
     2     8     1     8     2     3
     1     7     5     4     5     4
     2     6     3     1     8     4]; %hypothetical input

discard=any(diff(sort(A,1),1,1)==0); 

A(:,discard)=[]

A = 3×4

8 1 8 2 7 5 4 5 6 3 1 8

[Jacek Harazin]

Yes, that does exactly what i wanted (at least on the dataset i'm currently using :P).

Thank You.