[R] Isolating Distinct Dates between two data frames

[Jeff Newmiller]

a) Your use of HTML is corrupting your data. Post using plain text, and use dput output instead of trying to insert tables.

b) You should read about ?setdiff.

On March 1, 2020 1:12:04 PM PST, Ogbos Okike <giftedlife2014 using gmail.com> wrote:
>Dear Friends,
>I have two data frame of the form:
>1997-11-2219 -2.54910135429339
>1997-11-2222 -2.66865640466636
>1997-11-2305 -2.60761691358946
>1997-12-1104 -2.5323738405159
>1997-12-1106 -2.6020470080341
>1998-05-0204 -4.49745020062937
>1998-05-0209 -4.9462725263541
>1998-05-0213 -4.60533021405541
>1998-05-0218 -4.24415210827579
>1998-05-0220 -4.04368079911755
>1998-05-0222 -4.05320945184028
>1998-05-0302 -4.97226664313875
>1998-05-0307 -3.59108791877756
>1998-05-0310 -4.06038057061717
>1998-05-0313 -4.25967313751507
>1998-05-0316 -3.51896561964782
>1998-05-0318 -3.43849389406503
>1998-05-0321 -2.85778623531446
>1998-05-0323 -2.75731441597261
>1998-05-0401 -2.85684255921844
>1998-05-0403 -2.69637066510405
>1998-05-0408 -4.47519076670884
>1998-05-0411 -4.2644827160855
>1998-05-0414 -4.20377458198688
>1998-05-0417 -4.27306636458818
>1998-05-0420 -4.05235806406442
>1998-05-0500 -4.19141353436269
>1998-05-0506 -4.23999646421515
>1998-05-0510 -3.95905156765632
>1998-05-0512 -3.63857906459363
>
>and
>1997-11-2221 -2.04916867404692
>1997-11-2303 -1.7285761175751
>1998-04-3010 -1.51968127380408
>1998-04-3016 -1.51845077174125
>1998-05-0101 -1.91660416876407
>1998-05-0104 -2.11598840871961
>1998-05-0107 -1.99537253619755
>1998-05-0109 -1.81496189214167
>1998-05-0112 -1.7343458326657
>1998-05-0114 -1.77393506418581
>1998-05-0121 -1.57249698394961
>1998-05-0204 -3.64105829839415
>1998-05-0207 -3.5504415342881
>1998-05-0209 -3.71003029685917
>1998-05-0213 -3.31920767504605
>1998-05-0219 -3.98797337595274
>1998-05-0300 -3.17694445869443
>1998-05-0304 -3.09612110658432
>1998-05-0306 -3.29570935794719
>1998-05-0308 -3.24529756101203
>1998-05-0310 -3.20488571584633
>1998-05-0312 -3.16447382251761
>1998-05-0314 -2.86406188109331
>1998-05-0319 -2.5430318175571
>1998-05-0321 -2.87261970832946
>1998-05-0400 -2.55200145489882
>1998-05-0407 -3.27055844665711
>1998-05-0409 -3.24014605168738
>1998-05-0412 -3.29952737040137
>1998-05-0414 -3.44911485708791
>
>Some dates are common among the two.
>
>I use few  lines of code to select the common dates:
>setwd("./")
> list1<-read.table("THUL1",col.names=c("V1","V2"))
> list2<-read.table("INVK1",col.names=c("V1","V2"))
> B<-merge(list1,list2, by ="V1")
>
>Now, I wish to do something differently. I want to identify the dates
>that
>are in THUL1 but are not in INVK1 or vise versa, that is to identify
>uncommon dates among the two lists.
>
>Could you please assist me to achieve it.
>
>Thank you.
>Best regards
>Ogbos
>
>	[[alternative HTML version deleted]]
>
>______________________________________________
>R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.

-- 
Sent from my phone. Please excuse my brevity.