Vectors And Matrix 向量、矩阵、阵列的关系 向量(Vector):一维的矩阵,可分为 行向量 ( column vectors )及列向量(row vectors) 矩阵(Matrices):二维的阵列,一维的向量为其特例 阵列(Arrays):为矩阵延伸,可含有n维,二维的阵列及一维..
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a row vector 一个行矢量
row vector spaces 行向量空间
dimension row vector 维行向量
row vector of weight coefficient 权系数行向量
row-ordered image vector 行序图象向量
以上来源于: WordNet
For matrices, mean (X) is a row vector containing the mean value of each column.
对于矩阵来说,MEAN (X)是包含了每列平均值的行向量。
Then for each row from the fact table scan, the foreign key is also hashed and probed into the bit vector to determine whether the current fact table row is filtered out.
然后针对事实表扫描的每一行,外键也被散列并探测到位向量中,从而判断当前的事实表行是否被过滤掉了。
One thing that can be confusing about R's "everything is a vector" approach is that row-wise and column-wise operations may not adhere to your intuition.
关于 R 的 “所有东西都是向量” 方式,容易引起混乱的一点是行操作和列操作可能不符合直觉。
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