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In computer programming, initialization or initialisation is the assignment of an initial value for a data object or variable. The manner in which initialization is performed depends on the programming language, as well as the type, storage class, etc., of an object to be initialized.
The initialization step creates a base version of the system. The goal for this initial implementation is to create a product to which the user can react. It should offer a sampling of the key aspects of the problem and provide a solution that is simple enough to understand and implement easily.
In structural engineering, the Structural Identification using Expectation Maximization (STRIDE) [24] algorithm is an output-only method for identifying natural vibration properties of a structural system using sensor data (see Operational Modal Analysis ). EM is also used for data clustering.
Initialization methods. Commonly used initialization methods are Forgy and Random Partition. The Forgy method randomly chooses k observations from the dataset and uses these as the initial means. The Random Partition method first randomly assigns a cluster to each observation and then proceeds to the update step, thus computing the initial mean ...
for (initialization; condition; increment / decrement) statement The statement is often a block statement; an example of this would be: //Using for-loops to add numbers 1 - 5 int sum = 0 ; for ( int i = 1 ; i <= 5 ; ++ i ) { sum += i ; }
In Unix-based computer operating systems, init (short for initialization) is the first process started during booting of the operating system. Init is a daemon process that continues running until the system is shut down. It is the direct or indirect ancestor of all other processes and automatically adopts all orphaned processes
In numerical optimization, the Broyden–Fletcher–Goldfarb–Shanno ( BFGS) algorithm is an iterative method for solving unconstrained nonlinear optimization problems. [1] Like the related Davidon–Fletcher–Powell method, BFGS determines the descent direction by preconditioning the gradient with curvature information.
In computer programming, lazy initialization is the tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed. It is a kind of lazy evaluation that refers specifically to the instantiation of objects or other resources. This is typically accomplished by augmenting ...
A loop-invariant code example (in the C programming language) is. for (int i=0; i<n; ++i) { x = y+z; a[i] = 6*i + x*x; } where the calculations x = y+z and x*x can be moved before the loop, resulting in an equivalent, but faster, program: x = y+z; t1 = x*x; for (int i=0; i<n; ++i) { a[i] = 6*i + t1; }
Dynamic initialization involves all object initialization done via a constructor or function call (unless the function is marked with constexpr, in C++11). The dynamic initialization order is defined as the order of declaration within the compilation unit (i.e. the same file).