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Shubha Vishwanath Karanth

2008-Aug-12 11:46 UTC

[R] Between the values

Hi R,

 

This is a very trivial one....

 

C=0.1

 

I want to check whether my value of C is between 0 and 1 exclusively....
I don't want to use (C>0 & C<1). And I can't use a single
statement like
(0<C<1). Is there a between function? Or how do we specify from 0 to 1?
Does %in% help me?

 

 

Many Thanks,

Shubha

 

This e-mail may contain confidential and/or privileged i...{{dropped:13}}

Dan Davison

2008-Aug-12 12:23 UTC

head link

[R] Between the values

On Tue, Aug 12, 2008 at 05:16:01PM +0530, Shubha Vishwanath Karanth
wrote:> Hi R,
> 
>  
> 
> This is a very trivial one....
> 
>  
> 
> C=0.1
> 
>  
> 
> I want to check whether my value of C is between 0 and 1 exclusively....
> I don't want to use (C>0 & C<1). And I can't use a single
statement like
> (0<C<1). Is there a between function? Or how do we specify from 0 to
1?
> Does %in% help me?
If you don't like (C > 0 && C < 1), then just write your own
function
is.between(x, low, high) (NB1 you've basically written it already; NB2
single '&' for the vectorised version 'are.between').
People's
personal tastes about what's desirable will vary, and anyway it's good
practice to build up your own personal library of
functions. Ultimately if you have a high quality collection of related
functions for working on a particular sort of problem, then you should
publish them as an R package on CRAN.

Dan
> 
>  
> 
>  
> 
> Many Thanks,
> 
> Shubha
> 
>  
> 
> This e-mail may contain confidential and/or privileged i...{{dropped:13}}
> 
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
-- 
www.stats.ox.ac.uk/~davison

Shubha Vishwanath Karanth

2008-Aug-12 13:25 UTC

head link

[R] Between the values

Or at least anyways of defining a vector/(or something like that) which
has all values between 0 and 1? 

For example:
C(0,1) is incorrect, seq(0,1,0.2) is also incorrect, seq(0,1,0.00001) is
also incorrect.... How does one specify this?

Thanks, Shubha
 

-----Original Message-----
From: Dan Davison [mailto:davison at stats.ox.ac.uk] 
Sent: Tuesday, August 12, 2008 5:54 PM
To: Shubha Vishwanath Karanth
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Between the values

On Tue, Aug 12, 2008 at 05:16:01PM +0530, Shubha Vishwanath Karanth
wrote:> Hi R,
> 
>  
> 
> This is a very trivial one....
> 
>  
> 
> C=0.1
> 
>  
> 
> I want to check whether my value of C is between 0 and 1
exclusively....> I don't want to use (C>0 & C<1). And I can't use a single
statement
like> (0<C<1). Is there a between function? Or how do we specify from 0 to
1?> Does %in% help me?
If you don't like (C > 0 && C < 1), then just write your own
function
is.between(x, low, high) (NB1 you've basically written it already; NB2
single '&' for the vectorised version 'are.between').
People's
personal tastes about what's desirable will vary, and anyway it's good
practice to build up your own personal library of
functions. Ultimately if you have a high quality collection of related
functions for working on a particular sort of problem, then you should
publish them as an R package on CRAN.

Dan
> 
>  
> 
>  
> 
> Many Thanks,
> 
> Shubha
> 
>  
> 
> This e-mail may contain confidential and/or privileged
i...{{dropped:13}}> 
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
-- 
www.stats.ox.ac.uk/~davison
This e-mail may contain confidential and/or privileged i...{{dropped:10}}

Shubha Vishwanath Karanth

2008-Aug-12 13:45 UTC

head link

[R] Between the values

Thanks Ravi... But was just wondering if there existed a simple tricky command
for that without using the & condition....

Also was thinking on my second question that how do we define an interval
between 0 and 1 which contains all the values between 0 and 1.

Thanks, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510 
Bangalore * Colombo * London * New York * San Jos? * Singapore *
www.ambaresearch.com
 

-----Original Message-----
From: Ravi Varadhan [mailto:RVaradhan at jhmi.edu] 
Sent: Tuesday, August 12, 2008 7:12 PM
To: Shubha Vishwanath Karanth; 'Dan Davison'
Cc: r-help at stat.math.ethz.ch
Subject: RE: [R] Between the values


Hi Shubaa,

Here is one way to do this:

is.between <- function(x, a, b) {
x > a & x < b
}

set.seed(123)

x <- rnorm(5)

is.between(x, -1, 1)
 > is.between(x, -1, 1)
[1]  TRUE  TRUE FALSE  TRUE  TRUE>

Ravi.

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
Behalf Of Shubha Vishwanath Karanth
Sent: Tuesday, August 12, 2008 9:25 AM
To: Dan Davison
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Between the values

Or at least anyways of defining a vector/(or something like that) which has
all values between 0 and 1? 

For example:
C(0,1) is incorrect, seq(0,1,0.2) is also incorrect, seq(0,1,0.00001) is
also incorrect.... How does one specify this?

Thanks, Shubha
 

-----Original Message-----
From: Dan Davison [mailto:davison at stats.ox.ac.uk]
Sent: Tuesday, August 12, 2008 5:54 PM
To: Shubha Vishwanath Karanth
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Between the values

On Tue, Aug 12, 2008 at 05:16:01PM +0530, Shubha Vishwanath Karanth
wrote:> Hi R,
> 
>  
> 
> This is a very trivial one....
> 
>  
> 
> C=0.1
> 
>  
> 
> I want to check whether my value of C is between 0 and 1
exclusively....> I don't want to use (C>0 & C<1). And I can't use a single
statement
like> (0<C<1). Is there a between function? Or how do we specify from 0 to
1?> Does %in% help me?
If you don't like (C > 0 && C < 1), then just write your own
function
is.between(x, low, high) (NB1 you've basically written it already; NB2
single '&' for the vectorised version 'are.between').
People's personal
tastes about what's desirable will vary, and anyway it's good practice
to
build up your own personal library of functions. Ultimately if you have a
high quality collection of related functions for working on a particular
sort of problem, then you should publish them as an R package on CRAN.

Dan
> 
>  
> 
>  
> 
> Many Thanks,
> 
> Shubha
> 
>  
> 
> This e-mail may contain confidential and/or privileged
i...{{dropped:13}}> 
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
--
www.stats.ox.ac.uk/~davison
This e-mail may contain confidential and/or privileged i...{{dropped:10}}

______________________________________________
R-help at r-project.org mailing list
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.
This e-mail may contain confidential and/or privileged i...{{dropped:10}}

Shubha Vishwanath Karanth

2008-Aug-12 14:12 UTC

head link

[R] Between the values

Thanks....Didn't mean actually using '&', but not bigger than
that too...

I usually see something done much better in R-help by a code which I don't
know at all. So, wanted to know if I am missing somewhere in using some codes
which I am not aware of...so, posted the query...

Thanks for your help, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510 
Bangalore * Colombo * London * New York * San Jos? * Singapore *
www.ambaresearch.com

-----Original Message-----
From: Ravi Varadhan [mailto:RVaradhan at jhmi.edu] 
Sent: Tuesday, August 12, 2008 7:34 PM
To: Shubha Vishwanath Karanth; 'Dan Davison'
Cc: r-help at stat.math.ethz.ch
Subject: RE: [R] Between the values

Here is how you check whether a < x < b  "without" using the
`&' condition:

is.between <- function(x, a, b) {
(x - a)  *  (b - x) > 0
}

Ravi.

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
Behalf Of Shubha Vishwanath Karanth
Sent: Tuesday, August 12, 2008 9:46 AM
To: Ravi Varadhan; Dan Davison; Ravi Varadhan; Dan Davison; Ravi Varadhan;
Dan Davison; Ravi Varadhan; Dan Davison
Cc: r-help at stat.math.ethz.ch; r-help at stat.math.ethz.ch;
r-help at stat.math.ethz.ch; r-help at stat.math.ethz.ch
Subject: Re: [R] Between the values

Thanks Ravi... But was just wondering if there existed a simple tricky
command for that without using the & condition....

Also was thinking on my second question that how do we define an interval
between 0 and 1 which contains all the values between 0 and 1.

Thanks, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510 Bangalore * Colombo * London *
New York * San Jos? * Singapore * www.ambaresearch.com

-----Original Message-----
From: Ravi Varadhan [mailto:RVaradhan at jhmi.edu] 
Sent: Tuesday, August 12, 2008 7:12 PM
To: Shubha Vishwanath Karanth; 'Dan Davison'
Cc: r-help at stat.math.ethz.ch
Subject: RE: [R] Between the values

Hi Shubaa,

Here is one way to do this:

is.between <- function(x, a, b) {
x > a & x < b
}

set.seed(123)

x <- rnorm(5)

is.between(x, -1, 1)
 > is.between(x, -1, 1)
[1]  TRUE  TRUE FALSE  TRUE  TRUE>

Ravi.

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
Behalf Of Shubha Vishwanath Karanth
Sent: Tuesday, August 12, 2008 9:25 AM
To: Dan Davison
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Between the values

Or at least anyways of defining a vector/(or something like that) which has
all values between 0 and 1? 

For example:
C(0,1) is incorrect, seq(0,1,0.2) is also incorrect, seq(0,1,0.00001) is
also incorrect.... How does one specify this?

Thanks, Shubha

-----Original Message-----
From: Dan Davison [mailto:davison at stats.ox.ac.uk]
Sent: Tuesday, August 12, 2008 5:54 PM
To: Shubha Vishwanath Karanth
Cc: r-help at stat.math.ethz.ch
Subject: Re: [R] Between the values

On Tue, Aug 12, 2008 at 05:16:01PM +0530, Shubha Vishwanath Karanth
wrote:> Hi R,
> 
>  
> 
> This is a very trivial one....
> 
>  
> 
> C=0.1
> 
>  
> 
> I want to check whether my value of C is between 0 and 1
exclusively....> I don't want to use (C>0 & C<1). And I can't use a single
statement
like> (0<C<1). Is there a between function? Or how do we specify from 0 to
1?> Does %in% help me?
If you don't like (C > 0 && C < 1), then just write your own
function
is.between(x, low, high) (NB1 you've basically written it already; NB2
single '&' for the vectorised version 'are.between').
People's personal
tastes about what's desirable will vary, and anyway it's good practice
to
build up your own personal library of functions. Ultimately if you have a
high quality collection of related functions for working on a particular
sort of problem, then you should publish them as an R package on CRAN.

Dan
> 
>  
> 
>  
> 
> Many Thanks,
> 
> Shubha
> 
>  
> 
> This e-mail may contain confidential and/or privileged
i...{{dropped:13}}> 
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
--
www.stats.ox.ac.uk/~davison
This e-mail may contain confidential and/or privileged i...{{dropped:10}}

______________________________________________
R-help at r-project.org mailing list
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.
This e-mail may contain confidential and/or privileged i...{{dropped:10}}

______________________________________________
R-help at r-project.org mailing list
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.
This e-mail may contain confidential and/or privileged i...{{dropped:10}}

Shubha Vishwanath Karanth

2008-Aug-12 14:15 UTC

head link

[R] Between the values

Not to define a vector of all infinite values... But if I have some object (may
not be a vector) which has this interval, then I can apply whatever function I
need to on this interval apart from 'between' function... Is there
something like that... Hope I am clear with the idea...

Thanks, Shubha
Shubha Karanth | Amba Research
Ph +91 80 3980 8031 | Mob +91 94 4886 4510 
Bangalore * Colombo * London * New York * San Jos? * Singapore *
www.ambaresearch.com
 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Dan Davison
Sent: Tuesday, August 12, 2008 7:21 PM
To: r-help at r-project.org
Subject: Re: [R] Between the values




Shubha Vishwanath Karanth wrote:> 
> Or at least anyways of defining a vector/(or something like that) which
> has all values between 0 and 1? 
> 
> For example:
> C(0,1) is incorrect, seq(0,1,0.2) is also incorrect, seq(0,1,0.00001) is
> also incorrect.... How does one specify this?
> 
> 
Hi Shubha,

What are you trying to do? The set of all real numbers between 0 and 1 is
infinitely large. Obviously you can't explicitly construct an infinitely
large vector in R. If you want to construct an implicit specification of
that set, then I think I've already given you a good answer in R: define a
predicate function and use it. E.g.

between <- function(x, low, high) x > low && x < high

I don't know much at all about symbolic mathematics packages like Maple and
Mathematica, but maybe you're thinking of something you can do in those
softwares? R is not trying to be a competitor to them; they do lots of
things R doesn't, and vice versa.

Dan


Shubha Vishwanath Karanth wrote:> 
> 
> Thanks, Shubha
>  
> 
> -----Original Message-----
> From: Dan Davison [mailto:davison at stats.ox.ac.uk] 
> Sent: Tuesday, August 12, 2008 5:54 PM
> To: Shubha Vishwanath Karanth
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] Between the values
> 
> On Tue, Aug 12, 2008 at 05:16:01PM +0530, Shubha Vishwanath Karanth
> wrote:
>> Hi R,
>> 
>>  
>> 
>> This is a very trivial one....
>> 
>>  
>> 
>> C=0.1
>> 
>>  
>> 
>> I want to check whether my value of C is between 0 and 1
> exclusively....
>> I don't want to use (C>0 & C<1). And I can't use a
single statement
> like
>> (0<C<1). Is there a between function? Or how do we specify from 0
to
> 1?
>> Does %in% help me?
> 
> If you don't like (C > 0 && C < 1), then just write your
own function
> is.between(x, low, high) (NB1 you've basically written it already; NB2
> single '&' for the vectorised version 'are.between').
People's
> personal tastes about what's desirable will vary, and anyway it's
good
> practice to build up your own personal library of
> functions. Ultimately if you have a high quality collection of related
> functions for working on a particular sort of problem, then you should
> publish them as an R package on CRAN.
> 
> Dan
> 
>> 
>>  
>> 
>>  
>> 
>> Many Thanks,
>> 
>> Shubha
>> 
>>  
>> 
>> This e-mail may contain confidential and/or privileged
> i...{{dropped:13}}
>> 
>> ______________________________________________
>> R-help at r-project.org mailing list
>> 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.
> 
> -- 
> www.stats.ox.ac.uk/~davison
> This e-mail may contain confidential and/or privileged i...{{dropped:10}}
> 
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
> 
> 
-- 
View this message in context:
http://www.nabble.com/Between-the-values-tp18943069p18944668.html
Sent from the R help mailing list archive at Nabble.com.

______________________________________________
R-help at r-project.org mailing list
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.
This e-mail may contain confidential and/or privileged i...{{dropped:10}}

Gabor Grothendieck

2008-Aug-12 15:54 UTC

head link

[R] Between the values

SQL has a between operator and via sqldf you can do this using
the built in data frame BOD as an example:
> library(sqldf)
> BOD  Time demand
1    1    8.3
2    2   10.3
3    3   19.0
4    4   16.0
5    5   15.6
6    7   19.8> sqldf("select demand between 15 and 17 from BOD")  demand between 15 and 17
1                        0
2                        0
3                        0
4                        1
5                        1
6                        0>

On Tue, Aug 12, 2008 at 7:46 AM, Shubha Vishwanath Karanth
<shubhak at ambaresearch.com> wrote:> Hi R,
>
>
>
> This is a very trivial one....
>
>
>
> C=0.1
>
>
>
> I want to check whether my value of C is between 0 and 1 exclusively....
> I don't want to use (C>0 & C<1). And I can't use a single
statement like
> (0<C<1). Is there a between function? Or how do we specify from 0 to
1?
> Does %in% help me?
>
>
>
>
>
> Many Thanks,
>
> Shubha
>
>
>
> This e-mail may contain confidential and/or privileged i...{{dropped:13}}
>
> ______________________________________________
> R-help at r-project.org mailing list
> 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.
>

Ling, Gary (Electronic Trading)

2008-Aug-12 21:27 UTC

head link

[R] Between the values

# between (a,b)
a <- 0
b <- 1
x <- rnorm(10)
x
unclass(cut(x, breaks=c(-Inf,a,b,Inf)))==2

-gary

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Shubha Vishwanath Karanth
Sent: Tuesday, August 12, 2008 7:46 AM
To: r-help at stat.math.ethz.ch
Subject: [R] Between the values


Hi R,

 

This is a very trivial one....

 

C=0.1

 

I want to check whether my value of C is between 0 and 1 exclusively....
I don't want to use (C>0 & C<1). And I can't use a single
statement like
(0<C<1). Is there a between function? Or how do we specify from 0 to 1?
Does %in% help me?

 

 

Many Thanks,

Shubha

 

This e-mail may contain confidential and/or privileged
i...{{dropped:13}}

______________________________________________
R-help at r-project.org mailing list
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.
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