Combining data.frames

Evening Tom

Yest I've been playing with the merge function.  But haven't been able to
achieve what I need. Could maybe the way to to and it might be my syntax

-----Original Message-----
From: Tom Woolman <twoolman at ontargettek.com> 
Sent: Saturday, March 19, 2022 8:20 PM
To: reichmanj at sbcglobal.net
Cc: r-help at r-project.org
Subject: Re: [R] Combining data.frames

Have you looked at the merge function in base R?

https://www.rdocumentation.org/packages/base/versions/3.6.2/topics/merge


On 2022-03-19 21:15, Jeff Reichman wrote:

R-Help Community

I'm trying to combine two data.frames which each containing 10 columns 
of which they each share two common fields. Here are two small test 
datasets.

df1 <- data.frame(date =
c("2021-1-1","2021-1-1","2021-1-1","2021-1-1","2021-1-1",

"2021-1-2","2021-1-2","2021-1-3","2021-1-3","2021-1-3"),
                  geo_hash =
c("abc123","abc123","abc456","abc789","abc246","abc123",
                               "asd123","abc789","abc890","abc123"),
                  ad_id =
c("a12345","b12345","a12345","a12345","c12345",
                            
"b12345","b12345","a12345","b12345","a12345"))
df2 <- data.frame(date =
c("2021-1-1","2021-1-1","2021-1-2","2021-1-3","2021-1-3"),
                  geo_hash =
c("abc123","abc456","abc123","abc789","abc890"),
                  event =
c("shoting","ied","protest","riot","protest"))

I'm trying to combine them such that I get a combined data.frames such 
as

date		geo_hash	ad_id		event
1/1/2021	abc123		a12345		shoting
1/1/2021	abc123		b12345
1/1/2021	abc456		a12345		ied
1/1/2021	abc789		a12345
1/1/2021	abc246		c12345

Jeff