recreate array original

[turbofib]

hi,
look this:

a=[2 6 1;2 5 8;3 1 6]

[b,c]=find(a>3);

b= 1 
    2 
    2
    3

c=  2
     2
     3
     3

d=zeros(size(a));

I want to write a new matrix of zeros but keeping the values ​​found with
find

0 6 0
0 5 8
0 0 6

any help me?^ thank  (i see help find but i not found answer)






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