2012年10月28日 · As well as being dangerous for anything except trivial types, what you wrote is pointless: constructing the vector with size length already default-initialises all of the new …

2014年10月25日 · If $0$ were allowed as an eigenvector, suddenly every $\lambda \in \mathbb R$ would be an eigenvalue for it, rendering PCA meaningless because under its interpretation …

So the zero vector axiom is actually the only axiom that forces a vector (sub)space to be non-empty. Hence, a vector (sub)space containing a zero vector is equivalent (in the presence of …

2017年10月5日 · Consider 0+0' since 0 is zero vector of V, u + 0 = 0 + u = u, ∀ u ∈ V taking u = 0', 0+0' = 0' (i) 0' is also a zero vector of V according to our assumption. Therefore ∀ u ∈ V, u + 0' …

2015年10月14日 · X <- c(1:3)*0 Maybe this is not the most efficient way to initialize a vector to zero, but this requires to remember only the c() function, which is very frequently cited in …

2016年8月31日 · Suppose we want to find a basis for the vector space $\{0\}$. I know that the answer is that the only basis is the empty set. Is this answer a definition itself or it is a result of …

2017年10月4日 · So, a zero vector in $1D$ space is indeed expressed as $0$ in 'real number notation'. However it is not representing the real number zero (which is member of set of real …

2009年4月6日 · One possible extension of the term is to say that the result of this operation is any unit length vector (I mostly use (1, 0, 0) here). This is useful for example when you need the …

buckets = [[0 for col in range(5)] for row in range(10)] to avoid reference sharing between the rows. This looks more clumsy than chester1000's code, but is essential if the values are …

2012年10月3日 · I have been starting to use vectors, and have noticed that in all of the code I see to iterate though a vector via indices, the first parameter of the for loop is always something …