r - Create unique ID based on existing ID conditions -

-

i column of unique document ids, ids contain q or a:

"702-591|source-871987", "702-591|source-872066",  "702-591|source-872336", "702-591|source-872557",  "702-591|source-873368", "702-591|source-876216",  "702-591|source-907269", "702-591|source-10754a", "702-591|source-10754q",  "702-591|source-118603a", "702-591|source-118603q", "702-591|source-119738a"

i want create simpler unique id column (easy enough -- table$id <- c(1:nrow(table))). if existing column contains q or a, want q/a incorporated new id field. additionally, if 2 ids linked q/a, want new ids show 1q or 1a. example, records 8 & 9 are: "702-591|source-10754a", "702-591|source-10754q". new ids 8a & 8q, respectively. records 1 -5 have new ids of 1-5. need incorporating grep command here?

thanks!

this may little long, think works. you'll have install stringr package use it.

require(stringr) df <- data.frame(str_match(tab$old_id,"(.*[[:digit:]]+)([[:alpha:]]?)")) names(df) <- c("old_id","nonqa","qa") df2<- data.frame(nonqa=unique(df$nonqa)) df2$base <- seq_along(df2$nonqa) df3<- merge(df,df2) df3$id=paste(df3$base,df3$qa,sep="")

in end, have "old_id" , "id" columns in final data frame. read table "tab" since "table" function in r. else answering question, here is:

tab = data.frame(old_id=c("702-591|source-871987", "702-591|source-872066",  "702-591|source-872336", "702-591|source-872557",  "702-591|source-873368", "702-591|source-876216",  "702-591|source-907269", "702-591|source-10754a", "702-591|source-10754q",  "702-591|source-118603a", "702-591|source-118603q", "702-591|source-119738a"))

Comments

Post a Comment

Popular posts from this blog

java - Jmockit String final length method mocking Issue -

-
using jmockit 1.2 jar, trying mock string's length method getting unexpected invocation exception: failed: test java.lang.illegalstateexception: missing invocation mocked type @ point; please make sure such invocations appear after declaration of suitable mock field or parameter @ stringdemo.testa$1.<init>(testa.java:17) @ stringdemo.testa.test(testa.java:13) i using testng: @test public void test() throws exception { new expectations() { @mocked("length") string astring; { astring.length(); result = 2; } }; system.out.println(a.showa("test")); } } actual class a: public class { public static int showa(string str){ int a= str.length(); return a; } } this wrong way of recording expected results. shouldn't mock , record string's length() method, record showa() instead. here solution @suppresswarnings("unused...
Read more

What is the difference between data design and data model(ERD) -

-
i have google question , find answer in day. know, data design many many table have list column,and mark pk , fk. why er-diagram have find this? data design process of designing database. main output of data design detailed logical data model of database. some people data design includes of needed logical , physical design choices , physical storage parameters needed generate design in data definition language. technically, database analysis, database analysts (dbas) trained do. while person can both data design , database analysis, these 2 different tasks. data design models data. database analysis takes model , applies 1 or more database engines (relational, hierarchical, nosql). a logical data model 1 of main outputs of data design. data model represented entity relationship diagram, or er diagram.
Read more

ios - Can NSManagedObject conform to NSCoding -

-
i need transfer single object across device. right converting nsmanagedobject dictionary , archiving , sending nsdata. upon receiving unarchiving it. transfer nsmanagedobject archiving , unarchiving instead of creating intermediate data object. @interface test : nsmanagedobject<nscoding> @property (nonatomic, retain) nsstring * title; @end @implementation test @dynamic title; - (id)initwithcoder:(nscoder *)coder { self = [super init]; if (self) { self.title = [coder decodeobjectforkey:@"title"]; //<crash } return self; } - (void)encodewithcoder:(nscoder *)coder { [coder encodeobject:self.title forkey:@"title"]; } @end nsdata *archivedobjects = [nskeyedarchiver archiveddatawithrootobject:testobj]; nsdata *objectsdata = archivedobjects; if ([objectsdata length] > 0) { nsarray *objects = [nskeyedunarchiver unarchiveobjectwithdata:objectsdata]; } the problem above code is. crashes @ self.title in initwithcoder sa...
Read more