Search results
Results from the WOW.Com Content Network
up-one-lvl-kbd [4] – The "U" keyboard shortcut now navigates up one subpage level. hover-edit-section [5] – The "D" keyboard shortcut now edits the section you're hovering over. page-info-kbd-shortcut [6] – The "I" keyboard shortcut now opens the "Page information" link in your sidebar.
In Matlab/GNU Octave a matrix A can be vectorized by A(:). GNU Octave also allows vectorization and half-vectorization with vec(A) and vech(A) respectively. Julia has the vec(A) function as well. In Python NumPy arrays implement the flatten method, [note 1] while in R the desired effect can be achieved via the c() or as.vector() functions.
The stride syntax (nums[1:5:2]) was introduced in the second half of the 1990s, as a result of requests put forward by scientific users in the Python "matrix-SIG" (special interest group). [ 4 ] Slice semantics potentially differ per object; new semantics can be introduced when operator overloading the indexing operator.
The Keymaker is a fictional character, portrayed by Korean-American actor Randall Duk Kim, in the 2003 film The Matrix Reloaded.He is a computer program that can create shortcut commands, physically represented as keys, which can be used by other programs to gain quick access to various areas within the simulated reality of the Matrix.
Concretely, in the case where the vector space has an inner product, in matrix notation these can be thought of as row vectors, which give a number when applied to column vectors. We denote this by V ∗ := Hom ( V , K ) {\displaystyle V^{*}:={\text{Hom}}(V,K)} , so that α ∈ V ∗ {\displaystyle \alpha \in V^{*}} is a linear map α : V → K ...
In other words, the matrix of the combined transformation A followed by B is simply the product of the individual matrices. When A is an invertible matrix there is a matrix A −1 that represents a transformation that "undoes" A since its composition with A is the identity matrix. In some practical applications, inversion can be computed using ...
Gaussian elimination is the main algorithm for transforming every matrix into a matrix in row echelon form. A variant, sometimes called Gauss–Jordan elimination produces a reduced row echelon form. Both consist of a finite sequence of elementary row operations; the number of required elementary row operations is at most mn for an m-by-n ...
A matrix whose elements are of the form 1/(x i + y j) for (x i), (y j) injective sequences (i.e., taking every value only once). Centrosymmetric matrix: A matrix symmetric about its center; i.e., a ij = a n−i+1,n−j+1. Circulant matrix: A matrix where each row is a circular shift of its predecessor. Conference matrix