perfected until it is shared
-Jane Porter
--- On Wed, 7/22/09, Michael Knudsen wrote:
From: Michael Knudsen
Subject: [R] Find multiple elements in a vector
To: "r help"
Date: Wednesday, July 22, 2009, 2:32 PM
Hi,
Given a vector, say
x=sample(0:9,10)
x
[1] 0 6 3 5 1 9 7 4 8 2
I c
-Jane Porter
--- On Wed, 7/22/09, Michael Knudsen wrote:
From: Michael Knudsen
Subject: [R] Find multiple elements in a vector
To: "r help"
Date: Wednesday, July 22, 2009, 2:32 PM
Hi,
Given a vector, say
x=sample(0:9,10)
x
[1] 0 6 3 5 1 9 7 4 8 2
I ca
On Wed, Jul 22, 2009 at 9:37 PM, Chuck Cleland wrote:
> How about this?
>
> which(x %in% c(2,3))
Thanks to you all! I had never thought about using %% in this context.
--
Michael Knudsen
micknud...@gmail.com
http://lifeofknudsen.blogspot.com/
__
R-h
Hi,
On Jul 22, 2009, at 3:39 PM, Jorge Ivan Velez wrote:
Dear Michael,
Take a look at ?"%in%" This is an example:
set.seed(123)
x <- sample(0:9,10)
y <- c(2,3)
which(x %in% y)
# [1] 1 3
In addition to the above, you can also use the `match` function:
match(c(2,3), x)
[1] 1 3
The problem
Dear Michael,
Take a look at ?"%in%" This is an example:
set.seed(123)
x <- sample(0:9,10)
y <- c(2,3)
which(x %in% y)
# [1] 1 3
HTH,
Jorge
On Wed, Jul 22, 2009 at 3:32 PM, Michael Knudsen <> wrote:
> Hi,
>
> Given a vector, say
>
> x=sample(0:9,10)
> x
> [1] 0 6 3 5 1 9 7 4 8 2
>
> I can f
On 7/22/2009 3:32 PM, Michael Knudsen wrote:
> Hi,
>
> Given a vector, say
>
> x=sample(0:9,10)
> x
> [1] 0 6 3 5 1 9 7 4 8 2
>
> I can find the location of an element by
>
> which(x==2)
> [1] 10
>
> but what if I want to find the location of more than one number? I could do
>
> c(which(x==2)
Hi,
Given a vector, say
x=sample(0:9,10)
x
[1] 0 6 3 5 1 9 7 4 8 2
I can find the location of an element by
which(x==2)
[1] 10
but what if I want to find the location of more than one number? I could do
c(which(x==2),which(x==3))
but isn't there something more streamlined? My first guess was
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