dataframe - R: return pmin or pmax of data.frame with multiple columns -

-

Is there any way to select pmax / pmin of data frame with multiple columns ??

I want to return only the maximum or the minimum, not the entire line. 

  Max < - tail (df, n = 1) Maximum # v1 v2 v3 v4 v5 v6 v7 v8 # 2014-10 -03 17:35:00 58.91 45.81 33.06 70.76 36.3 9 45.53 33.52 34.36 a.m. (maximum) # v1 v2 v3 v4 v5 v6 V7 v8 # 2014-10-03 17:35:00 58.91 45.81 33.06 70.76 36.3 9 45.53 33.52 34.36   
 For this line, I expect a return value:  
  70.76   
 ... because it is the maximum value in all the columns.   
 
 
 Use  do.call  to call  Pmax  To compare all the columns for each line value, for example:  
  dat < - data.frame (a = 1: 5, b = delegate (3,5)) # abb # 1 1 3 # 2 2 3 # 3 3 # 4 4 3 # 5 5 3 Q. Call (bmx, dat) # [1] 3 3 3 4 5   
 When you call  pmax  directly on a complete data frame, then there is only one argument PA Ssed for the ceremony and nothing to compare it. Therefore, it argues for supply because it should be maximum. It works for non-numerical and numerical arguments, even if it does not matter:  
  pmax (7) # [1] 7 pmax ("a") # [1 ] "A" Pmax (using data.frame (1,2,3)) # X1 X2 X3 # 1 1 2 3   
 Using  do.call (pmax,. ..)  with data. Frame means that you can pass each column of data. As the list of logic for the frame to  pmax :  
  do.call (pmax) , Dat)   
 is equal to:  
  pmax (dat $ a, dat $ b)

Comments

Post a Comment

Popular posts from this blog

mysql - where clause in inner join query -

-
Please help me about this question: Look for functions ($ userpno) } {Echo $ userpno; $ This-> query = "SELECT task.employee_id, task.user_id, task.service_id, service.name AS servicename, service.description AS servicedescription, employee.name as employineame, employee.pic_path employment, employee.pic_path from work Work.user_id = '$ userpno' Join the INNER employee. Pno = task.employee_id Join INNER user user.pno = task.user_id service.service_id = task.service_id "INNER service; } query works perfectly without: WHERE task.user_id = '$ userpno' my Also try this method: WHERE task.user_id = $ userpno but it does not work. Error: Warning: mysqli_fetch_array () parameter 1 is expected to be mysqli_result, given in Boolean C: \ wamp \ www \ admin \ classes \ Task Php on line 22 Please tell me where I say where is it. Try: $ this-> query = "SELECT Task.employee_id, task.user_id, task.service_id, service.name AS s...
Read more

php - MySQL Query for Advanced Search multiple criteria -

-
I am working through an advanced search query where users select the checkbox based on multiple criteria. I am starting because I am hoping that I will know whether I am on the right path. I know that the query is quite messy Edit: I realized that there are two questions to be needed, so I have strictly modified a question question table data tables ss_users user_id FIRST_NAME LAST_NAME admin_level user_approved 1 Nick Jones 0 1 2 Johnny Rocket 0 1 table ss_user_profile_status user_id photo_uploaded 1 1 2 1 table ss_user_photos selected user_id file name photo_id 1 1 photo_1 .jpg 1 2 2 photo_2.jpg 0 3 2 photo_2.jpg 1 table ss_general user_id city state zip neighborhood 1 Baltimore maryland 00125 hamsterdam 2 Lekland My 11542 treemont table ss_languages ​​user_id French German Italian Spanish 1 0 1 0 1 2 0 1 1 Table ss_experience Waldorf Kumon homeschooling user_id 1 0 1 0 2 0 0 1 My current The result is that all users, which should not be the case: ... Select ss_use...
Read more

java - Why my included JSP file won't get processed correctly? -

-
I am trying to create Java web framework (and learning), and on the basis of 'Code Generator In the process of making the material view of the database in the process of development, I stumbled into a difficulty, which I do not know how to solve it. First of all, I want the following index.jsp : & lt; Body & gt; Use all pages to be created. & Lt;% @ include file = "header.jsp"% & gt; & Lt; Hours / & gt; & Lt;% @ included file = "body.jsp"%> & Lt; Hours / & gt; & Lt;% @ include file = "footer.jsp"% & gt; & Lt; / Body & gt; And, in body.jsp , I should have it like this: & lt; Jsp: include page = "$ {Application_modul}"%> Where application_modul is an attribute defined in its controller: request.setAttribute ("application_modul", "USER_ACCOUNT \\ ' View_user_account.jsp "); This file can be found properly, but the processed JSP does ...
Read more