How do I create such matrix ? (please look at the thread for further details)

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Derick Wong
Derick Wong 2013-12-19
评论： Derick Wong 2013-12-19
Hi,
Let say I have a matrix [ X1 X2 X3 X4 X5... Xm; Y1 Y2 Y3 Y4 Y5... Ym; Z1 Z2 Z3 Z4 Z5... Zm]
I need to use a method base on X1, X2 and X3 to get my new X4, X5 till Xm and same goes for Y and Z.
For X
The method in order to find X4 is X4=(X1+X2+X3)/3. Once X4 is calculated, we use the X4 to calculate X5 which now the it will turn out to be X5=(X2+X3+X4)/3 and find X6 using the found X5 and X4, X6=(X3+X4+X5)/3 and so on until we find Xm.
same goes for Y and Z.
My question is, how do we come out with such matrix if there is 93 rows and 343 column?

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采纳的回答

Jos (10584)
Jos (10584) 2013-12-19
编辑：Jos (10584) 2013-12-19
So, the original values X4, X5 etc. are not used at all?
XYZ = ceil(10*rand(4,6)) % example data
RESULT = zeros(size(XYZ)) ;
RESULT(:,[1 2 3]) = XYZ(:,[1 2 3])
M = size(XYZ,2) ;
for k = 4:M
RESULT(:,k) = sum(RESULT(:,k-[1 2 3]),2)/3
end

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