Can't figure out warning message

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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

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

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______________________________________________
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

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

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
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

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

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:

[snip]

As the posting guide says:

When responding to a very simple question, use the
following algorithm:
2. type 4*runif(1) at the R prompt, and wait this many hours

 > 4*runif(1)
[1] 3.141592

Obviously, I acted much too hastily. My apologies.

Peter
Peter Ehlers
Department of Mathematics and Statistics
University of Calgary, 2500 University Dr. NW       ph: 403-220-3936