standard library vector type learning
Vector Object Initialization method
vector ;
Default constructor v1 is empty
vector;
V2 is a copy of V1, V2 and v1 must be of the same type, that is, when the type in angle brackets is defined.
vector;
V3 contains n elements of the val
Use of the vector of the STL
Getting started with the first part
Vectors can be used instead of arrays in C, or CArray in MFC, from many explanatory documents or online comments, and generally agree that vectors should be used more efficiently and with exceptional security. And vectors are the default containers recommended by STL, unless you know you have special needs, using vectors that do not meet your needs, such as requiring containers to be eff
From: http://bigdata.iteye.com/blog/1777022
Vector and assignment
R works on the named data structure. The simplest structure is a numerical vector consisting of a string of ordered values.
X
This is a value assignment statement completed by Function C. (
Note: equivalent to assign ("X", C ))
Vector operations
The basic arithmetic operators are commonly used +,-
In the previous article, we discussed the vector declaration. Next, you will see the vector interface and implementation.
Class vector {
Public:
...
Iterator begin () {return start;} // return the beginning of vetorConst_iterator begin () const {return start;} // read-only accessIterator end () {return finish;} // return the end of the VectorConst_iterator end ()
The template class vector is a sequential container that encapsulates an array of dynamic sizes, and the sequences it controls are stored in a contiguous array. As with any other type of container, it can hold various types of objects.Include header file # include Characteristics:1) Sequential sequence: The elements in the container are sorted in strict linear order. The corresponding element can be accessed by the element's position in the sequence.2
The inner product of the first section of a vector. Mathematical Concepts
1. Inner product: With n-dimensional vector
Make
It is called [X,y] as the inner product of the vector x and Y.
2. Norm: A norm (or length) called a vector x.
3. Unit vector: The
Vector is the most widely used type of container in STL, and its important characteristics are summarized and summarized here. the initialization of vectors
Vector initialization, see the following code.
Vectorvector
the capacity and size of the vectorVectors are stored sequentially in memory, so the vector is initialized with an initial capacity (capacity), and
We can regard vector as an array upgrade. It is an array in a broad sense and its data type is defined by itself. The number of array elements is unlimited.
Vector definition: vector
Initialization Method:
Vector Vector Vector
Transferred from: 56842637#commentboxFirst, IntroductionThe C + + vector class provides an alternative representation of the built-in array, which, like the string class, is part of the standard library and is used with a header file:#include Ii. Summary of the use of vectors:1. Vector initialization: There can be five ways to illustrate the following:(1) vector(
Vector Graphics for the design we are not unfamiliar, most designers have different degrees of contact with illustrator, CorelDRAW and other vector graphics software, but in the Web application is rarely touched, if you have to say some words should be counted Flash SWF vector animation. We've had more contact with bitmap-format graphics in the past, but in the p
A vector is a class in a java.util package that implements a function similar to a dynamic array.
Vectors and arrays are similar, you can save a set of data (a list of data). But the size of the array is fixed, and once specified, it cannot be changed, whereas vectors provide a function similar to "dynamic array", one of the important differences between vectors and arrays is that the capacity of vectors is variable.
You can insert different types o
A brief introduction to 1.vector
Vector, as one of the standard containers provided by STL, is often used and has a very important position, and it is also easy to use. Vector, also known as vectors, can be depicted as an array of lengths that can be dynamically altered, with similar functions and arrays. In fact, the more professional description is that
The Vector class provides the ability to implement a growing array, and as more elements are added to it, the array becomes larger. After you delete some elements, the array becomes smaller. Vector has three constructors, public vector (Int. initialcapacity,int capacityincrement) public vector (int. initialcapacity) Pu
C + + Primer (Fifth edition) learning Note _2_ Standard Template Library vector (1)Welcome to read the reference, if there are errors or questions, please leave a message to correct, thank youVector container vectors not only can be randomly accessed as arrays, but can also be used to insert elements at the tail, which can replace arrays.It is important to note that vector has the function of automatic memo
Support Vector machine is a class two classification model, but it can also be extended to multi-class classification. Based on the characteristics of space maximization and kernel technique, it can flexibly deal with linear or nonlinear classification problems.The support vector machine is a convex two-time programming problem, and the learning algorithm is the optimization algorithm based on convex two-ti
[JAVA set] Vector and Stack, javavectorstack
The following content is based on the jdk1.7.0 _ 79 source code;What is Vector and Stack?
Vector: thread-safe Dynamic Array
Stack: inherits Vector, a thread-safe Stack based on dynamic arrays;Vector and Stack features
The
C ++ getting started -- vector of the standard template library
Vector is a very useful container in C ++. Vector is considered a container because it can store various types of objects like a container. Simply put, vector can be of any type (int, double, string, can also be a dynamic array of classes), can add and com
1. What is raster data and what is vector data?In GIS, for the classification of data format, we usually divide it into two types: raster data and vector data. Raster data is a cell that considers space as discrete and is expressed by a two-dimensional array or other data organization. Vector data, on the contrary, regards space as continuous, with features (poin
The most common method for finding the intersection of two straight lines is to list the equations of two straight lines and solve them simultaneously.
However, this method has many drawbacks:
1) The algorithm is related to the coordinate system. It is necessary to consider whether the straight line is horizontal or vertical, write many judgment conditions, and increase the instability of the program.
2) even if the two straight lines are oblique, as long as they are close to the horizontal or v
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