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error + matrix dimension must agree

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Nik
Nik 2014-3-16
编辑： Nik 2014-3-19
I got error -- Error using + Matrix dimensions must agree.
on this code. Please help me
a=sign(X(ind1)).*(abs(X(ind1))-T);
b=abs(X);
c=plus(a,b);

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Mischa Kim
Mischa Kim 2014-3-16
编辑：Mischa Kim 2014-3-16
Nik, X and T need to be same-sized vectors unless T is a scalar.
What are you trying to do in
a = sign(X(ind1)).*(abs(X(ind1))-T);
especially w.r.t. T?
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Mischa Kim
Mischa Kim 2014-3-18
What are the sizes of X and T? Is T a scalar?
Nik
Nik 2014-3-19
编辑：Nik 2014-3-19
Sir Mischa, T is:
M=size(pic,1)^2;
T=sig*sqrt(2*log(M));
while X is the wavelet coefficient value. TQVM.

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