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Ordinary least squares regression of Okun's law.Since the regression line does not miss any of the points by very much, the R 2 of the regression is relatively high.. In statistics, the coefficient of determination, denoted R 2 or r 2 and pronounced "R squared", is the proportion of the variation in the dependent variable that is predictable from the independent variable(s).
Given a subset S of R n, a vector field is represented by a vector-valued function V: S → R n in standard Cartesian coordinates (x 1, …, x n).If each component of V is continuous, then V is a continuous vector field.
In vector calculus, the Jacobian matrix (/ dʒ ə ˈ k oʊ b i ə n /, [1] [2] [3] / dʒ ɪ-, j ɪ-/) of a vector-valued function of several variables is the matrix of all its first-order partial derivatives.
The Vektor SS-77 is a general-purpose machine gun designed and manufactured by Denel Land Systems—formerly Lyttleton Engineering Works (LIW)—of South Africa.
The curl of a vector field F, denoted by curl F, or , or rot F, is an operator that maps C k functions in R 3 to C k−1 functions in R 3, and in particular, it maps continuously differentiable functions R 3 → R 3 to continuous functions R 3 → R 3.
The Vektor R4 is a South African 5.56×45mm assault rifle. [8] It entered service as the standard service rifle of the South African Defence Force (SADF) in 1980. [ 1 ] In South African service, the R4 replaced the R1, a variant of the 7.62×51mm FN FAL . [ 7 ]
In linear algebra, a rotation matrix is a transformation matrix that is used to perform a rotation in Euclidean space.For example, using the convention below, the matrix = [ ]
In 2001 restructuring of Vektor by its parent company Denel, and a failed link up attempt with Colt USA led to the end production of civilian firearms by Vektor. As of July 2000, 13000 pistols had been sold, of which 6000 were sold outside of South Africa. [5] Because of the buy back program the pistols are now very rare in the United States.