octopus vector

R language because of the efficiency problem, the realization of natural language processing analysis will be affected, how to improve the efficiency and improve the accuracy of the word vector is in the current software environment, compared with the need to solve the problem.The author thinks that there are still some problems:1, how to improve the operating efficiency of large-scale corpus in the R language environment?2, how to improve the accurac

Today, I learned a bit about computational geometry, which is about determining whether a point is within a triangle (on a two-dimensional plane). One of the algorithms is "the same direction method", mainly with the cross product to determine whether the two points on the same side of a line segment, (1) is shown. About "The same way" again not to do specific introduction, interested students can Baidu, or focus on my post updated. I'll continue to learn, summarize and post on the blog in the "

Source: http://www.jb51.net/article/44231.htmFont: [Increase decrease] Type: Reprint time: 2013-12-08 I want to commentVectors are vector types that can hold many types of data, such as several integers, so call it a container, this article describes how to useVectors are vector types that can hold many types of data, such as several integers, so they are called containers.

0. Preface In order to solve the problem of raster slicing, long slicing time, large amount of data transmission and weak style customization ability, more and more enterprise cases begin to use vector deception as the way of map loading in Webgis. So far, the more successful and common use of vector slicing technology flow, mainly divided into the following two kinds. ArcGIS Pro makes

mentioned. This is the function interval. Description :A: Taking two-dimensional space as an example, the linear equation is changed to +c=0 ax+by+c=0. The usage vector w instead (A, b) is represented by the feature vector x, which is the formula.B: For the straight line we learned. By substituting the negative instance point (0,0), we can see that the calculated result +1 is inconsistent with

STD: Difference Between Reserve and resize of Vector1. Reserve: Allocate space, change capacity but not size2.Resize: Allocate space. Changing the capacity also changes the size. If you know the vector size, resize it as an array without allocating extra memory. ReserveIt is a container reserved space, but does not actually create element objects. Before creating an object, you cannot reference the elements in the container. Therefore, when add

There is a copy function in the STL algorithm. We can easily write this code:#include #include #include using namespace STD;int_tmain (intARGC, _tchar* argv[]) {Doubledarray[Ten]={1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9}; vectordouble>Vdouble (Ten); vectordouble>:: Iterator Outputiterator=vdouble.begin (); Copy (darray,darray+Ten, Outputiterator); while(Outputiterator!=vdouble.end ()) {coutreturn 0;}So you want to use copy to set the to vector, so you

The most basic data type of R language-vectors (vector)1, insert the vector element, all elements in the same vector must be the same pattern (data type), such as Integer, numeric (floating-point), character (string), logical, plural, and so on. View the type of the variable can be queried using the typeof (X) function.> #插入向量元素 > x 2, delete the elements in the

Dynamically assigned vector pointer Vector If it is a dynamically allocated vector pointer, you can only use the array method (the above Code is red) when inserting elements into the vector. the push_back () function has an error. Why? Use the shared_ptr vector point

Original link: http://blog.csdn.net/cws1214/article/details/47984053 1. Avoid frequent redistribution One of the most admirable features of STL containers is that they can automatically grow enough to accommodate the data you put in, as long as they are not larger than their maximum size. (To know the maximum value, just call the member function named Max_size.) ） For vectors and strings, if more space is needed, the size is increased by a similar realloc thought. This realloc-like operation ha

Previous blogs have written about vectors using the sort algorithm, and vector some of the processing methods that have been written before.Just write it today vector . Sort by using the sort algorithm.#include #include #include #include #include BOOLCompare_int (intAMP;LHS,int RHS) {returnLHS > RHS;}BOOLCompare_first_letter (Const STD::unique_ptrSTD::string> AMP;LHS,Const STD::unique_ptrSTD::string> RHS)

In practice, the vector series in c ++-C ++ 11 extends the vector member functions (cbegin (), cend (), crbegin (), crend (), and emplace (), data ()) The emplace_back mentioned above is added to C ++ 11. Therefore, this blog just wants to list how C ++ 11 expands the vector container. Std: vector: cbegin and std:

In practice, the vector series in c ++ -- copy set to vector (do not confuse reserve and resize) The stl algorithm has a copy function. We can easily write this Code: #include #include #include using namespace std;int _tmain(int argc, _TCHAR* argv[]){ double darray[10]={1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9}; vector vdouble(10);

distributional Vector VS. Distributed Vector Similarities and differences. For natural language the same pointare based on distribution ideas using the same corpus distributional models (Bow,lsi,lda)Altogether now the same text area morphemes (such as the same statement) related, the more common statements in the corpus, the more relevant to use the number of common statements to construct words and words

The arraylist, inclulist, and vestor classes all implement the java. util. List interface, but they have different features, mainly as follows: I,Synchronization Arraylist and inclulist are not synchronized, while vestor is. Therefore, if thread security is required, arraylist or javaslist can be used to save costs for synchronization. But in the case of multithreading, sometimes we have to use vector. Of course, you can also package arraylist and his

Vector series in practice c ++ -- sort the vector (unique_ptr (string) using the sort algorithm (sort function error "two parameters should be input, but three parameters are provided) Previously, I wrote a blog post on sorting the vector using the sort algorithm.vector > . Today, let's write a pairvector > Use the sort algorithm for sorting. # In

In practice, the vector series in c ++ -- vector (unique_ptr () initialization (Ownership Transfer) C ++ 11 provides us with smart pointers and brings us a lot of convenience. What if unique_ptr is used as an element of the vector container? The format is exactly the same:vector > vec; But how to add elements to vec? See the following: # Include

Vector initialization and traversal-dtor-blog Vector initialization and traversal STD: Vector Int > Inttest; For(IntI=0; I10;++I){Inttest. push_back (I );} For (STD: Vector Int > : Iterator ITER = Inttest. Begin (); ITER ! = Inttest. End (); ++ ITER){STD: cout * ITER STD: Endl

For vector usage, the additional time consumed by copying data to prevent reallocate memory. The following two combinations can be used to prevent reallocate. 1. Vector: resize () using array index 2. Vector: Reserve () Use push_back (). So I tested these two cases on the Windows 2003 platform, and compared them with 3 in which push_back () is directly