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deconcept
2005 Aug 23
1
matrix conformity with matrix 1x1 and scalars
Hello,
I am calculating this thing with vectors (b) and matrices (G,P):
b'G/sqrt(b'Pb)
where the denominator is a quadratic form and therefore always a scalar.
In Scilab, it is quite simple:
b'*G/sqrt(b'*P*b)
However, in R, the denominator is an (1x1)matrix and R claims it is non
conformable and I have to use drop() or as.numeric(). Like this:
> b = 1:2
> G=diag(1,2)
>