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Ravi Varadhan

2005-Nov-21 23:16 UTC

[R] Can't figure out warning message

Hi,

 

I apologize for the previous posting, where the message was not formatted
properly.  Here is a better version:

 

I have written the following function to check whether a vector has elements
satisfying monotonicity.

 

is.monotone <- function(vec, increase=T){

ans <- TRUE

vec.nomis <- vec[!is.na(vec)]

if (increase & any(diff(vec.nomis,1) < 0, na.rm=T)) ans <- FALSE

if (!increase & any(diff(vec.nomis,1) > 0, na.rm=T)) ans <- FALSE

ans

}

 

This works correctly, but I get this error message as below.

 
> x <- 2:10
> is.monotone(x)
[1] TRUE

Warning messages:

1: the condition has length > 1 and only the first element will be used in:
if (increase & any(diff(vec.nomis, 1) < 0, na.rm = T)) ans <- FALSE

2: the condition has length > 1 and only the first element will be used in:
if (!increase & any(diff(vec.nomis, 1) > 0, na.rm = T)) ans <- FALSE 
> 
 

I am unable to see why the condition should have a length greater than 1,
since "any" should give me a single logical value.  

 

Can any one tell me what is going on here?  (I am using version 2.1.1 on
Windows).

 

Thanks very much,

Ravi.

 

--------------------------------------------------------------------------

Ravi Varadhan, Ph.D.

Assistant Professor,  The Center on Aging and Health

Division of Geriatric Medicine and Gerontology

Johns Hopkins University

Ph: (410) 502-2619

Fax: (410) 614-9625

Email:   <mailto:rvaradhan@jhmi.edu> rvaradhan@jhmi.edu

--------------------------------------------------------------------------

 


	[[alternative HTML version deleted]]

Berton Gunter

2005-Nov-21 23:24 UTC

head link

[R] Can't figure out warning message

Works fine for me with no warning messages. R for Windows 2.2.0. Try
upgrading (but I don't see why you get the warning either).

Try changing & to && though, as you don't need to vectorize the
conjunction.

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
 
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box
 
 
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Ravi Varadhan
> Sent: Monday, November 21, 2005 3:17 PM
> To: 'RHelp'
> Subject: [R] Can't figure out warning message
> 
> Hi,
> 
>  
> 
> I apologize for the previous posting, where the message was 
> not formatted
> properly.  Here is a better version:
> 
>  
> 
> I have written the following function to check whether a 
> vector has elements
> satisfying monotonicity.
> 
>  
> 
> is.monotone <- function(vec, increase=T){
> 
> ans <- TRUE
> 
> vec.nomis <- vec[!is.na(vec)]
> 
> if (increase & any(diff(vec.nomis,1) < 0, na.rm=T)) ans <- FALSE
> 
> if (!increase & any(diff(vec.nomis,1) > 0, na.rm=T)) ans <- FALSE
> 
> ans
> 
> }
> 
>  
> 
> This works correctly, but I get this error message as below.
> 
>  
> 
> > x <- 2:10
> 
> > is.monotone(x)
> 
> [1] TRUE
> 
> Warning messages:
> 
> 1: the condition has length > 1 and only the first element 
> will be used in:
> if (increase & any(diff(vec.nomis, 1) < 0, na.rm = T)) ans <-
FALSE
> 
> 2: the condition has length > 1 and only the first element 
> will be used in:
> if (!increase & any(diff(vec.nomis, 1) > 0, na.rm = T)) ans <-
FALSE
> 
> > 
> 
>  
> 
> I am unable to see why the condition should have a length 
> greater than 1,
> since "any" should give me a single logical value.  
> 
>  
> 
> Can any one tell me what is going on here?  (I am using 
> version 2.1.1 on
> Windows).
> 
>  
> 
> Thanks very much,
> 
> Ravi.
> 
>  
> 
> --------------------------------------------------------------
> ------------
> 
> Ravi Varadhan, Ph.D.
> 
> Assistant Professor,  The Center on Aging and Health
> 
> Division of Geriatric Medicine and Gerontology
> 
> Johns Hopkins University
> 
> Ph: (410) 502-2619
> 
> Fax: (410) 614-9625
> 
> Email:   <mailto:rvaradhan at jhmi.edu> rvaradhan at jhmi.edu
> 
> --------------------------------------------------------------
> ------------
> 
>  
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! 
> http://www.R-project.org/posting-guide.html
>

Kjetil Brinchmann Halvorsen

2005-Nov-21 23:24 UTC

head link

[R] Can't figure out warning message

Ravi Varadhan wrote:> Hi,
> 
>  
> 
> I apologize for the previous posting, where the message was not formatted
> properly.  Here is a better version:
> 
>  
> 
> I have written the following function to check whether a vector has
elements
> satisfying monotonicity.
> 
>  
> 
> is.monotone <- function(vec, increase=T){
> 
> ans <- TRUE
> 
> vec.nomis <- vec[!is.na(vec)]
> 
> if (increase & any(diff(vec.nomis,1) < 0, na.rm=T)) ans <- FALSE
> 
> if (!increase & any(diff(vec.nomis,1) > 0, na.rm=T)) ans <- FALSE
> 
> ans
> 
> }
> 
>  
> 
> This works correctly, but I get this error message as below.
> 
>  
> 
>> x <- 2:10
> 
>> is.monotone(x)
> 
> [1] TRUE
> 
> Warning messages:
> 
> 1: the condition has length > 1 and only the first element will be used
in:
> if (increase & any(diff(vec.nomis, 1) < 0, na.rm = T)) ans <-
FALSE
> 
> 2: the condition has length > 1 and only the first element will be used
in:
> if (!increase & any(diff(vec.nomis, 1) > 0, na.rm = T)) ans <-
FALSE
> 
> 
Try to double the &: && in place of &

Kjetil

>  
> 
> I am unable to see why the condition should have a length greater than 1,
> since "any" should give me a single logical value.  
> 
>  
> 
> Can any one tell me what is going on here?  (I am using version 2.1.1 on
> Windows).
> 
>  
> 
> Thanks very much,
> 
> Ravi.
> 
>  
> 
> --------------------------------------------------------------------------
> 
> Ravi Varadhan, Ph.D.
> 
> Assistant Professor,  The Center on Aging and Health
> 
> Division of Geriatric Medicine and Gerontology
> 
> Johns Hopkins University
> 
> Ph: (410) 502-2619
> 
> Fax: (410) 614-9625
> 
> Email:   <mailto:rvaradhan at jhmi.edu> rvaradhan at jhmi.edu
> 
> --------------------------------------------------------------------------
> 
>  
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
>

Ravi Varadhan

2005-Nov-21 23:29 UTC

head link

[R] Can't figure out warning message

Hi,

I apologize for my hasty posting.  The function works perfectly, after I
realized that I had a matrix named "T" sitting in my workspace, so
when I
set my default option for "increase" to T, it created a problem. 
Changing
my default to "TRUE" solved my problem.

Thanks,
Ravi.
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch [mailto:r-help-
> bounces at stat.math.ethz.ch] On Behalf Of Ravi Varadhan
> Sent: Monday, November 21, 2005 6:17 PM
> To: 'RHelp'
> Subject: [R] Can't figure out warning message
> 
> Hi,
> 
> 
> 
> I apologize for the previous posting, where the message was not formatted
> properly.  Here is a better version:
> 
> 
> 
> I have written the following function to check whether a vector has
> elements
> satisfying monotonicity.
> 
> 
> 
> is.monotone <- function(vec, increase=T){
> 
> ans <- TRUE
> 
> vec.nomis <- vec[!is.na(vec)]
> 
> if (increase & any(diff(vec.nomis,1) < 0, na.rm=T)) ans <- FALSE
> 
> if (!increase & any(diff(vec.nomis,1) > 0, na.rm=T)) ans <- FALSE
> 
> ans
> 
> }
> 
> 
> 
> This works correctly, but I get this error message as below.
> 
> 
> 
> > x <- 2:10
> 
> > is.monotone(x)
> 
> [1] TRUE
> 
> Warning messages:
> 
> 1: the condition has length > 1 and only the first element will be used
> in:
> if (increase & any(diff(vec.nomis, 1) < 0, na.rm = T)) ans <-
FALSE
> 
> 2: the condition has length > 1 and only the first element will be used
> in:
> if (!increase & any(diff(vec.nomis, 1) > 0, na.rm = T)) ans <-
FALSE
> 
> >
> 
> 
> 
> I am unable to see why the condition should have a length greater than 1,
> since "any" should give me a single logical value.
> 
> 
> 
> Can any one tell me what is going on here?  (I am using version 2.1.1 on
> Windows).
> 
> 
> 
> Thanks very much,
> 
> Ravi.
> 
> 
> 
> --------------------------------------------------------------------------
> 
> Ravi Varadhan, Ph.D.
> 
> Assistant Professor,  The Center on Aging and Health
> 
> Division of Geriatric Medicine and Gerontology
> 
> Johns Hopkins University
> 
> Ph: (410) 502-2619
> 
> Fax: (410) 614-9625
> 
> Email:   <mailto:rvaradhan at jhmi.edu> rvaradhan at jhmi.edu
> 
> --------------------------------------------------------------------------
> 
> 
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! http://www.R-project.org/posting-
> guide.html

P Ehlers

2005-Nov-22 00:12 UTC

head link

[R] Can't figure out warning message

My guess is that you have an object 'T' hanging around.
Like Berton, I get no error until I define:

T <- 0:1

and then run your test case, resulting in the warnings.

Peter


Ravi Varadhan wrote:
> Hi,
> 
>  
> 
> I apologize for the previous posting, where the message was not formatted
> properly.  Here is a better version:
> 
>  
> 
> I have written the following function to check whether a vector has
elements
> satisfying monotonicity.
> 
>  
> 
> is.monotone <- function(vec, increase=T){
> 
> ans <- TRUE
> 
> vec.nomis <- vec[!is.na(vec)]
> 
> if (increase & any(diff(vec.nomis,1) < 0, na.rm=T)) ans <- FALSE
> 
> if (!increase & any(diff(vec.nomis,1) > 0, na.rm=T)) ans <- FALSE
> 
> ans
> 
> }
> 
>  
> 
> This works correctly, but I get this error message as below.
> 
>  
> 
> 
>>x <- 2:10
> 
> 
>>is.monotone(x)
> 
> 
> [1] TRUE
> 
> Warning messages:
> 
> 1: the condition has length > 1 and only the first element will be used
in:
> if (increase & any(diff(vec.nomis, 1) < 0, na.rm = T)) ans <-
FALSE
> 
> 2: the condition has length > 1 and only the first element will be used
in:
> if (!increase & any(diff(vec.nomis, 1) > 0, na.rm = T)) ans <-
FALSE
> 
> 
> 
>  
> 
> I am unable to see why the condition should have a length greater than 1,
> since "any" should give me a single logical value.  
> 
>  
> 
> Can any one tell me what is going on here?  (I am using version 2.1.1 on
> Windows).
> 
>  
> 
> Thanks very much,
> 
> Ravi.
> 
>  
> 
> --------------------------------------------------------------------------
> 
> Ravi Varadhan, Ph.D.
> 
> Assistant Professor,  The Center on Aging and Health
> 
> Division of Geriatric Medicine and Gerontology
> 
> Johns Hopkins University
> 
> Ph: (410) 502-2619
> 
> Fax: (410) 614-9625
> 
> Email:   <mailto:rvaradhan at jhmi.edu> rvaradhan at jhmi.edu
> 
> --------------------------------------------------------------------------
> 
>  
> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html
-- 
Peter Ehlers
Department of Mathematics and Statistics
University of Calgary, 2500 University Dr. NW       ph: 403-220-3936

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