How can I delete array rows with same numbers

Hello,

I am having trouble finding a way to delete rows in my array with the same numbers.

For example I want to turn X=[123; 234; 213; 435] into X=[123; 234; 435] because rows 1 and 3 have the same numbers.

I've tried coming up with solutions using using "sort" and "unique" but can't quite figure it out. I'll be working with an array around 1225x3 with positive and negative numbers.

Also, every row adds up to equal the same number.

Thanks for any help you guys can give.

Answer 1

[Walter Roberson]

[sortedrows, ia] = unique(X,'rows');
newX = X(sort(ia,:));

Answer 2

[Andrei Bobrov]

[b b]=unique(sort(X,2),'rows','first');
out = X(sort(b),:)