R help - Apr 2022 - Executing index value for unequal vector lengths

Good day useRs,

I have the data of two vectors
> dput(DDD)
c(1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
2020, 2021)
> dput(EEE)
c(2018, 2019, 2020, 2021)

You can see that 2018, 2019, 2020, 2021 are equal in both vectors.

I want to execute the index values for the values in DDD which are equal to EEE
(31,32,33,34); and also the index values where EEE values are equal to DDD
(1,2,3,4).

I tried the following commend but it didn't work
>which(EEE==DDD))
I thank-you very much in advance

	[[alternative HTML version deleted]]

On Wed, 20 Apr 2022 06:18:14 +0000
Eliza Botto <eliza_botto at outlook.com> wrote:
> EEE==DDD
== doesn't work because it's element-wise. Try the %in% operator, or
setdiff() if you know that EEE and DDD are sets and you'd like to be
fancy.

-- 
Best regards,
Ivan

?match

On April 19, 2022 11:18:14 PM PDT, Eliza Botto <eliza_botto at
outlook.com> wrote:
>Good day useRs,
>
>I have the data of two vectors
>
>> dput(DDD)
>c(1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
>1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
>2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
>2020, 2021)
>
>> dput(EEE)
>c(2018, 2019, 2020, 2021)
>
>You can see that 2018, 2019, 2020, 2021 are equal in both vectors.
>
>I want to execute the index values for the values in DDD which are equal to
EEE (31,32,33,34); and also the index values where EEE values are equal to DDD
(1,2,3,4).
>
>I tried the following commend but it didn't work
>
>>which(EEE==DDD))
>
>I thank-you very much in advance
>
>	[[alternative HTML version deleted]]
>
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-- 
Sent from my phone. Please excuse my brevity.