finding the position of elements in a matrix if the elements are repeated

X=[

148 124

189 147

119 121

160 144

160 102

133 125

63 99

104 122

141 112

182 135

112 109

153 132

103 90

144 113

145 87

97 110

124 114

165 137

95 111

136 134

180 92

109 115

39 89

141 112

160 102

133 125

63 99

104 122

123 80

164 103

121 77

73 100]

Y=[

39 89

63 99

63 99

73 100

103 90

121 77

95 111

97 110

123 80

112 109]

i want to know the position of Y values in X, as the vlaues in Y are repeated i coudn't get my right postion with is code

[~,loc,~] = intersect(X, Y ,'rows')

it gives me a location

23

7

32

19

16

13

11

31

29

its only correct for few elements and its giving wrong postion.

can some please fix this issue which will be very helpfull.

thank you

[Stephen23]

"its only correct for few elements and its giving wrong postion."

Please show us the correct output.

[sampath kumar punna]

23

7

26

32

20

31

22

19

29

11

[ME]

I don’t understand how your suggested output could be correct. Row 13 of X is in Y but 13 isn’t in your proposed correct solution.

Answer 1

[ME]

You could use

pos = find(ismember(Z, M, 'rows') == 1);

instead, although as I have commented above, I don’t think your suggested correct solution is actually correct.

[Stephen23]

I agree that row 13 or X should be in the output. Well spotted.

Note that the ==1 is superfluous (all it does is convert false to false and true to true, as ismember already returns a logical output).

[ME]

Thanks for pointing that out. I should have noticed that!