Data=xlsread('A.xlsx');

NuSet=unique (Data,'rows');

xlswrite('B.xlsx',NuSet);

Thank you. The result of your code is:

B:

1   1.21

1   1.22

2   1.34

2   1.35

3   1.5

4   1.6

5   1.72

but I want under result :

1    1.21

2    1.34

3     1.5

4     1.6

5     1.72

Small change Amir,

[tt,x,y]=unique(Data(:,1),'rows') ;

NuSet=Data(x,:);

where a and y are the indices of  unique and all the elements of the array .

Thank you very much. It is correct.