How fill a part of 3D array with decreasing values?

2013 3 8
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Dear all,
I have a 3D array and I just want to fill a buck of this array with decreasing values, with step i've chosen. The values would decrease only in one direction, and constant on the two others.
For instance i have this : >> N=10; >> X=zeros(N,N,N); >> X(:,:,1:10)=20:-2:2; ??? Assignment has fewer non-singleton rhs dimensions than non-singleton subscripts
Could somebody help me with the syntax please?
Thanks in advance.
Alexandre.

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Carlos
Carlos 2013-3-8

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I think you are trying to do something like this
>> a=20:-2:2;
>> for i=1:10
for j=1:10
X(i,j,1:10)=a(1:10);
end
end

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