Matlab - Generar matriz a partir de 3 vectores de datos distintos

a=[1 1984 10; 1 1999 13; 1 2000 25; 1 2005 48; 2 1984 65; 2 2000 15 ; 2 2005 12; 3 1984 47; 3 2005 57; 4 1984 59; 4 1999 54; 5 2000 30];

b=unique(a(:,1));

c=unique(a(:,2));

matriz=nan(length(b)+1,length(c)+1);

for k=1:length(b)

    for j=1:length(c)

        s=find(and(a(:,1)==b(k),a(:,2)==c(j)),1,'first');

        if ~isempty(s)

        matriz(k+1,j+1)=a(s,3);

        end

    end

end

matriz(2:end,1)=b;

matriz(1,2:end)=c;

disp(matriz)

clear all

A=[1	1984	10

1	1999	13

1	2000	25

1	2005	48

2	1984	65

2	2000	15

2	2005	12

3	1984	47

3	2005	57

4	1984	59

4	1999	54

5	2000	30]

k=1;

n=1;

v=unique(A(:,2));

for i=1:length(unique(A(:,1)));

    for j=1:length(v)

        if v(j)==A(n,2)   &&  i==A(n,1)

            M(k,j)=A(n,3);

            if n<size(A,1)

           n=n+1;

            end

        else

              M(k,j)=NaN;

        end

    end

     k=k+1;

end

M

>> generar_matriz_desde_vector

A =

           1        1984          10

           1        1999          13

           1        2000          25

           1        2005          48

           2        1984          65

           2        2000          15

           2        2005          12

           3        1984          47

           3        2005          57

           4        1984          59

           4        1999          54

           5        2000          30

M =

    10    13    25    48

    65   NaN    15    12

    47   NaN   NaN    57

    59    54   NaN   NaN

   NaN   NaN    30   NaN