Different value from Matlab function NTSC2RGB when multiplying with the given yiq to rgb conversion matrix?

I am using matlab function ntsc2rgb but its output differs from the actual multiplication of the matrix function given on the matlab webpage.

http://www.mathworks.in/help/images/ref/ntsc2rgb.html nI is a 3 dimensional ntsc value matrix.

fprintf('before\n');
    for i=1:2
        for j=1:2
            for t=1:3
                disp(sprintf('%g   %g   %g   %g', i , j , t ,nI([i],[j],[t])));
           end
       end
    end
    fprintf('after\n');
    nI=ntsc2rgb(nI);
    for i=1:2
        for j=1:2
            for t=1:3
                disp(sprintf('%g   %g   %g   %g', i , j , t ,nI([i],[j],[t])));
           end
       end
    end

Matlab shows this output 
before
1   1   1   0.956863
1   1   2   -0.165627
1   1   3   -0.0367254
1   2   1   0.956863
1   2   2   -0.165627
1   2   3   -0.0367253
2   1   1   0.952941
2   1   2   -0.165569
2   1   3   -0.0367732
2   2   1   0.952941
2   2   2   -0.165568
2   2   3   -0.0367733
after
1   1   1   0.719921
1   1   2   0.9519
1   1   3   1
1   2   1   0.719921
1   2   2   0.951899
1   2   3   1
2   1   1   0.71902
2   1   2   0.951868
2   1   3   1
2   2   1   0.71902
2   2   2   0.951868
2   2   3   1

But actual value should be 
value of   0   0   0   0.776073
value of   0   0   1   1.025472
value of   0   0   2   1.077615
value of   0   1   0   0.776073
value of   0   1   1   1.025472
value of   0   1   2   1.077615
value of   1   0   0   0.772224
value of   1   0   1   1.021548
value of   1   0   2   1.073515
value of   1   1   0   0.772224
value of   1   1   1   1.021548
value of   1   1   2   1.073515