Comparing matrices with different dimensions

I have a matrix [row, col, vector] with a large number of entries for row, col and vector.

I have another matrix [x, y] with few entries.

I want to derive a matrix [xr, yc, zv] for all the values for which (x==row and y==col) and zv should be the corresponding value of 'vector' for which (x=row and y=col)

e.g:

[row col vector]= 2  2  4;
                  3  2  6;
                  7  1  8;
                  5  2  3;
                  8  1  7;

[x y]= 3  2;
       8  1

then, [xr yc zv] should equal = 3  2  6;
                                8  1  7

Your help will be greatly appreciated. Thanks!

Answer 1

[Image Analyst]

Use ismember() with the rows option:

m= [2  2  4;
    3  2  6;
    7  1  8;
    5  2  3;
    8  1  7]

m2= [3 2;
     8 1
   7 3]

matches = ismember(m(:,1:2), m2, 'rows')
out = m(matches,:)

[Mahi Nazir]

Brilliant! Thank you very much for a quick and appropriate response

Answer 2

[dpb]

Since your values are in the first two columns, it's fairly easily written...

>> res=a(ismember(a(:,1:2),v,'rows'),:)
res =
   3     2     6
   8     1     7
>>