How to select specific data from array

I have a data of

1 1 2 2

2 2 3 1.5

3 3 4 2.2

4 4 5 6.8

5 4 6 1

6 5 7 5.1

7 6 8 2.5

8 7 9 3.3

9 8 10 2.8

10 8 11 1.4

11 10 12 3.2

12 11 13 2.7

13 12 14 1.9

14 13 15 4.5

i wanted to select and compared data in column 2 and 3 row by row to check if there are repeted data in the following row starting from 1st row

For example,

the data in column 2 and 3, row 1 is 1 & 2

1 & 2 is being compared to second row to check if there is any repeated value in column 2 and 3

value 2 is repeated in row 2 thus the process is repeated to compared value 2 & 3 with value in row 3 column 2 and 3

Answer 1

[Remy Lassalle-Balier]

Hi,

How about comparing the number of rows of your matrix with the number of rows after passing through the unique function:

Tst = [ 1	1	2	2;
2	2	3	1.5;
3	3	4	2.2;
4	4	5	6.8;
5	4	6	1;
6	5	7	5.1;
7	6	8	2.5;
8	7	9	3.3;
9	8	10	2.8;
10	8	11	1.4;
11	10	12	3.2;
12	11	13	2.7;
13	12	14	1.9;
14	13	15	4.5];
AllRowsAreUnique = size( Tst , 1 ) == size( unique( Tst(:,2:3) , 'rows') , 1 );