the ranking of data in a single worksheet is fine, but how do you do it without a worksheet merge if you rank data among multiple worksheets?
A small group held a long jump, hundred meters, put three games, divided into 3 groups, the group should rank and have awards, the group also has to carry out 3 groups of full ranking, also has awards. The results of the 3 groups were grouped into one, two and three
In R, there are three main functions related to sorting: sort (), rank (), order ().The sort (x) is the vector x that is sorted, and the return value is sorted by the numeric vector. Rank () is a function of rank, and its return value is the "rank" of the corresponding element in the vector. The return value of order (
QQ Group member rank title how to obtain?
1, the rank title according to the user in the group rank different and change, the rank is higher by the former rank title more distinguished;
2, all members of the group ranked according to the level of integration, the same poin
(J,n) Sa[r[j]]=J;}intMain () {scanf ("%s", ch+1); N=strlen (ch+1); Rep (i,n) r[i]=Ch[i]; Getsa (); printf ("RANK:"); Rep (i,n) printf ("%d", R[i]); printf ("\nsa:"); Rep (i,n) printf ("%d", Sa[i]); return 0;}However, given the specificity of the rank array (a certain So we can solve the nBut this is quite easy to write wrong and need to master the principle of cardinal sort firstThe cardinality sort is
Rank () sorts data in a table hierarchically.For example, student_resultName number Kemu fenshuLi 0113101 High 90Zhang 0113098 high 80Wang 0113077 High 70Li 0113101 physical 80Zhang 0113098 physical 90Wang 0113077 physical 70
If I want to retrieve the first two names in the table with a high number and the first two names in the physical tableYou can use the rank () method to achieve the goal.
-- First sort
My colleague asked a very simple question: how can I retrieve the minimum value of another column in each partition?
create table t1 (int c1, int c2);
If the partition is based on C2, 0-10, 10-20, 20-30, 30-40, 40-50
insert into t1 values(101, 1);insert into t1 values(102, 2);insert into t1 values(111, 11);insert into t1 values(112, 12);insert into t1 values(121, 21);insert into t1 values(122, 22);insert into t1 values(131, 31);insert into t1 values(132, 32);insert into t1 values(133,
To evaluate the performance of our first year CS majored students, we consider their grades of three courses only:c-C P Rogramming Language, M-mathematics (calculus or Linear Algebra), and E-english. At the mean time, we encourage students by emphasizing on their best ranks – that's, among the four ranks with respect T o The three courses and the average grade, we print the best rank for each student.For example, the grades of C, M, E and A-average of
Rank () Over is the function of finding a rank after the specified condition is detected, but there is a feature. If it is the student rankings, then practical this function, the results of the same two are tied, for example 1 2 2 4.
2Dense_rank () The Role and rank () very much like, the only difference is that brought life student's results tied up, the next
RankTime limit:1000/1000 MS (java/others) Memory limit:32768/32768 K (java/others)Total submission (s): 4160 Accepted Submission (s): 1616Problem Descriptionjackson wants to know he rank in the class. The professor has posted a list of student numbers and marks. Compute Jackson ' s rank in class; That's, if he has the top mark (or was tied for the top mark) his rank
Row_number () over (PARTITION by COL1 ORDER by COL2)
Represents a grouping based on COL1, sorted by COL2 within a group
This value represents the sequential numbering of each group's internal sorting (a sequential unique within the group)
Rank () is similar, but rank is ranked in the same way as the rank, can be ranked 2 first place after the 3rd place
LAG ind
reproduced in: Http://www.tuicool.com/articles/Zb2qYzj
And the collection has two optimizations.
I. Consolidation by rank
Description: When connecting to two different subsets, rank is the link, and rank is lower than rank high. Rank high as a Father node.
function, so simil
Question information:
1012. The best rank (25) Time Limit 400 MS
The memory limit is 32000 kb.
Code length limit: 16000 B
Criterion author Chen, Yue
To evaluate the performance of our first year CS majored students, we consider their grades of three courses only: C-C programming language, M-Mathematics (calculus or linear algebra ), and e-English. at the mean time, we encourage students by emphasizing on their best ranks -- that is, among the four r
A Data grouping report was created several days ago and then re-ordered. It is written in crystal script. First, set a global variable to auto-add it, And then clear it in each group head. The code is very simple and I will not post it.After a short time, a colleague sought a grouping and then re-ordered the statement. He thought that my report was made using a similar SQL statement. In fact, if Oracle is used, the rank function can also implement gro
Reprint Address: http://www.cnblogs.com/linJie1930906722/p/6036053.htmlThe partition by keyword is part of the analytic function, which differs from the aggregation function in that it can return multiple records in a group, whereas aggregate functions generally have only one record that reflects the statistical value, and partition by is used to group the result set. If not specified then it takes the entire result set as a grouping, and the partition function is generally used with the
s.subjectname= ' math ' then S.subjectscore else 0 end) as mathematical results,SUM (case when s.subjectname= ' English ' then S.subjectscore else 0 end) as English scoreFrom student SGROUP BY S.stunameORDER BY S.stuname
Results obtained after implementation:
The above practice is also very easy to understand, here is not much to say, but the above is also limited. Because there are some fixed values here. such as "Chinese, maths," in the case. "But when you meet a small business need, you can
A matrix of rank 1 has been specifically discussed, with n-1 linear independent vectors from ax=0 Ax = 0, Lenovo to: Aα=0⋅αa\alpha = 0\cdot \alpha, knowing that 0 must be a eigenvalues of a, and n-1-valued eigenvalues.
Such a nature, if examined alone, is too simple. In another article, we summarize the idea that the matrix of rank 1 is exponentiation.
http://blog.csdn.net/u011240016/article/details/5280566
Address: http://www.cnblogs.com/nokiaguy/archive/2009/02/05/1384860.html
The ranking function isSQL server2005Added features. InSQL server2005There are four ranking functions:
1. row_number
2. Rank
3. dense_rank
4. ntileThe following describes the functions and usage of these four ranking functions. Before the introduction, assume that there is a t_table table. The table structure is shown in Table 1:
Figure 1
WhereField1The field
From sparse representation to low rank representation (i)Determine the direction of research has been in the mad theory, recently read some articles, have some ideas, by the way also summed up the representation series of articles, because I just contact, may be some shortcomings, I would like you to correct.The series of articles from sparse representations to low-rank representations include the following
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