[R] Problems using hetcor (polycor)

Birgitle birgit.lemcke at systbot.uzh.ch
Thu Aug 7 13:59:53 CEST 2008 

I am so sorry there was a little mistake in the code again.

Right code now:

library(methods)
setClass("of")
setAs("character", "of", function(from) as.ordered(from))

Classe72<-cclasses <- c(rep("factor", 55),  rep("numeric",6), rep ("of",
12))

TestPart<-read.table("TestPart.txt", header=TRUE,row.names=1,
na.strings="NA" ,colClasses = Classe72)

library(polycor)

TestPart.hetcor<-hetcor(TestPart, use="complete.obs")

B.


Birgitle wrote:
> 
> Thanks Mark and I am sorry that I forgot to adapt the Classe-vector.
> 
> This should work now
> 
> library(methods)
> setClass("of")
> setAs("character", "of", function(from) as.ordered(from))
> 
> Classe72<-cclasses <- c(rep("factor", 55),  rep("numeric",6), rep
> ("factor", 12))
> 
> TestPart<-read.table("TestPart.txt", header=TRUE,row.names=1,
> na.strings="NA" ,colClasses = Classe72)
> 
> library(polycor)
> 
> TestPart.hetcor<-hetcor(TestPart, use="complete.obs")
> 
> Mark Difford wrote:
>> 
>> Hi Birgitle,
>> 
>> You need to get this right if someone is going to spend their time
>> helping you. Your code doesn't work: You have specified more columns in
>> colClasses than you have in the provided data set.
>> 
>>> TestPart<-read.table("TestPart.txt", header=TRUE,row.names=1,
>>> na.strings="NA" ,colClasses = Classe81)
>> Error in scan(file, what, nmax, sep, dec, quote, skip, nlines,
>> na.strings,  : 
>>   line 1 did not have 82 elements
>> 
>>> TestPart<-read.table("TestPart.txt", header=TRUE,row.names=1,
>>> na.strings="NA")
>> Warning message:
>> In scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings,  :
>>   number of items read is not a multiple of the number of columns
>> 
>>> length(names(TestPart))
>> [1] 72
>> 
>>> length(Classe81)
>> [1] 82
>> 
>> That will never work.
>> 
>> HTH, Mark.
>> 
>> 
>> Birgitle wrote:
>>> 
>>> Sorry if this post should be long but I tried to give you a piece of my
>>> data to reproduce my error message using hetcor:
>>> 
>>> Fehler in result$rho : $ operator is invalid for atomic vectors
>>> Zusätzlich: Warning messages:
>>> 1: In polychor(x, y, ML = ML, std.err = std.err) :
>>>   1 row with zero marginal removed
>>> 2: In polychor(x, y, ML = ML, std.err = std.err) :
>>>   the table has fewer than 2 rows
>>> 
>>> 
>>> Error in result$rho : $ operator is invalid for atomic vectors
>>> Additional: Warning message:
>>> 1: In polychor(x, y, ML = ML, std.err = std.err) :
>>>   1 row with zero marginal removed
>>> 2: In polychor(x, y, ML = ML, std.err = std.err) :
>>>   the table has fewer than 2 rows
>>> 
>>> Use tab delimited data at the end of the post.
>>> Copy in Texteditor and save as TestPart.txt 
>>> 
>>> Then use the following code
>>> 
>>> library(methods)
>>> setClass("of")
>>> setAs("character", "of", function(from) as.ordered(from)) 
>>> 
>>> Classe81<-cclasses <- c(rep("factor", 64),  rep("numeric",6), rep ("of",
>>> 12))
>>> 
>>> TestPart<-read.table("TestPart.txt", header=TRUE,row.names=1,
>>> na.strings="NA" ,colClasses = Classe81)
>>> 
>>> str(TestPart)
>>> 
>>> library(polycor)
>>> 
>>> TestPart.hetcor<-hetcor(TestPart, use="complete.obs")
>>> 
>>> this will produce the above mentioned error message that I can not
>>> interprete.
>>> 
>>> Would be great if somebody could help me to solve the problem.
>>> 
>>> Thanks
>>> 
>>> B.
>>> 
>>> 
>>> 
>>> 
>>> 	1	2	3	4	7	8	9	10	12	13	14	15	16	17	18	19	21	22	23	25	27	28	29	30	31	33
>>> 34	35	36	37	38	39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54	55	56	58
>>> 59	60	61	62	63	64	65	66	67	68	69	70	71	72	73	74	75	76	77	78	79	80
>>> AX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	0	1	0	1	0	0	1	1	0	0	0	0	0	1	0	0	0	1	0	0	0
>>> 0	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0	1	0	1	25	5	9	1	8.5	2.5	3	5	2	2	3	3	1	1	1
>>> 2	1	2
>>> BX	1	1	0	0	1	0	0	1	NA	NA	NA	0	0	0	0	1	0	0	1	0	0	1	0	NA	NA	NA	NA	NA	NA	NA
>>> NA	0	0	0	1	0	NA	NA	NA	NA	NA	NA	NA	0	0	0	0	1	1	0	0	0	1	1	NA	NA	6	1	3.25
>>> 2.25	5	5	2	2	3	3	1	1	1	1	1	1
>>> CX	1	1	0	0	1	0	0	1	1	0	0	0	1	0	1	0	0	1	0	1	0	0	0	0	1	1	0	0	0	0	0	0	1	0	0
>>> 0	0	1	0	0	0	0	0	0	0	0	1	0	0	0	0	1	0	0	15	3.5	6	1	5.5	5.5	5	5	2	2	1	2	1	1
>>> 1	1	2	2
>>> DX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	0	1	0	0	1	0	0	1	0	0	1	0	1	0	0	0	1	0	0	0	0
>>> 1	1	0	0	0	0	0	0	0	0	0	1	0	1	0	1	0	1	0	50	17.5	7.5	2.5	8.5	5	5	5	2	2	2	3
>>> 1	1	1	1	3	3
>>> EX	1	0	1	0	1	0	0	1	NA	NA	NA	0	0	0	1	1	0	1	1	0	1	0	0	0	0	0	0	1	0	0	0	0	1
>>> 0	0	0	0	0	0	0	1	0	0	0	0	0	1	0	1	0	0	0	1	0	NA	NA	14.5	30	13	2.5	3	3	1	1	4
>>> 4	1	1	1	1	1	1
>>> FX	1	0	1	0	1	0	0	1	0	0	0	0	0	0	0	1	0	0	1	0	1	0	0	0	1	1	1	0	0	1	1	0	0	0	1
>>> 1	1	0	0	0	1	0	0	0	0	0	1	0	1	0	1	1	0	0	165	25	11.5	15	12	6.5	5	5	1	1	3	3
>>> 1	1	1	1	4	5
>>> GX	1	0	1	0	1	0	0	1	0	0	1	0	0	0	0	1	1	1	0	0	1	0	0	0	0	0	1	0	0	1	1	0	1	0	0
>>> 1	0	0	0	0	1	0	0	0	1	0	0	0	0	0	1	0	1	0	40	20	14.5	9.5	11	10	3	3	1	1	1	3	1
>>> 1	3	4	1	3
>>> HX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	0	1	0	1	0	0	1	0	0	NA	NA	NA	NA	NA	NA	NA	NA
>>> NA	NA	NA	NA	NA	1	0	0	0	1	0	0	0	0	0	0	0	1	1	1	0	1	0	70	18.5	1	12.5	7.2
>>> 7.2	5	5	2	2	3	3	3	3	1	1	2	4
>>> JX	1	0	1	0	1	0	0	1	0	0	0	0	0	1	1	0	0	1	0	1	0	0	0	0	1	0	1	0	0	0	0	0	1	1	0
>>> 0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	0	0	1	0	65	9	11	18	4.5	3.75	1	3	2	3	2	2	1
>>> 1	1	1	2	2
>>> KX	1	0	1	0	1	0	0	1	NA	NA	NA	0	0	1	0	0	0	0	1	0	1	0	0	0	0	0	1	1	0	0	1	0	0
>>> 1	1	0	0	1	0	0	0	0	0	0	0	0	0	1	0	0	0	1	0	0	NA	NA	4.25	4.5	2.1	1.6	3	3	2	2
>>> 2	3	1	1	1	2	1	1
>>> LX	1	0	0	1	1	0	0	1	0	1	0	0	0	0	1	0	0	0	1	1	0	0	0	0	0	0	0	1	1	0	0	1	1	0	0
>>> 0	0	1	0	0	0	0	0	0	1	0	0	1	0	0	0	0	1	0	80	32.5	13	4	8.5	5.25	2	3	3	3	3	3
>>> 1	1	1	1	3	4
>>> MX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	1	1	0	1	0	0	1	0	0	0	0	1	0	0	0	0	0	0	0	0	1
>>> 0	0	0	0	0	1	0	1	1	0	0	0	0	0	0	0	0	0	1	45	7.5	14	1	11	5.5	3	4	2	2	3	3	1	1
>>> 1	1	2	3
>>> NX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	1	0	0	1	0	0	1	1	0	0	0	1	0	0	0	0	0	0	0	0	1
>>> 0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	0	0	0	1	42.5	12.5	17.5	1	11	NA	5	5	2	2	3	3
>>> 1	1	1	1	1	2
>>> OX	1	1	0	0	1	0	0	1	NA	NA	NA	0	0	0	0	1	0	0	1	0	1	0	1	0	1	1	0	0	0	0	0	0	0
>>> 0	1	0	0	0	0	0	1	0	0	0	1	0	0	1	0	0	0	0	0	1	NA	NA	25	1	25	NA	3	4	1	2	3	3	1
>>> 1	3	3	1	1
>>> PX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	0	1	0	1	1	0	0	1	0	0	1	1	0	0	0	0	0	0	0	0	1
>>> 0	0	0	0	0	1	0	0	1	1	0	0	0	0	0	0	0	0	1	42.5	11.5	21.5	2	25	NA	4	5	2	2	3	3
>>> 1	1	1	2	1	2
>>> QX	1	1	0	0	1	0	0	1	NA	NA	NA	0	0	0	1	1	0	0	1	1	0	0	0	0	1	1	1	0	0	0	0	0	0
>>> 0	1	0	0	1	0	0	1	0	0	1	1	0	0	0	0	0	0	0	0	1	NA	NA	27.5	1.5	19	NA	3	3	2	2	3
>>> 3	1	1	1	2	1	1
>>> RX	1	1	0	0	1	0	0	1	NA	NA	NA	0	0	0	0	1	0	1	0	0	0	1	0	0	0	1	0	0	0	0	0	0	0
>>> 0	1	0	0	0	0	0	1	0	0	1	1	0	0	0	0	0	0	0	0	1	NA	NA	30	1	24	NA	3	4	2	2	3	3	1
>>> 1	3	3	1	1
>>> SX	1	1	0	0	1	0	0	1	0	0	1	0	0	0	1	1	0	1	0	1	0	1	0	0	0	1	0	0	0	0	0	0	0	0	1
>>> 0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	0	0	0	1	47.5	20	22.5	2	15	NA	5	5	2	2	3	3	1
>>> 1	1	1	2	2
>>> TX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	1	0	0	1	0	1	0	0	0	0	0	1	0	0	0	0	0	0	0	0	1
>>> 0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	0	0	0	1	40	11	15	1.5	11.5	NA	5	5	2	3	3	3	1
>>> 1	1	1	2	2
>>> UX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	0	1	0	0	1	1	0	0	0	0	1	1	0	0	0	0	0	0	0	0	1
>>> 0	0	1	0	0	1	0	0	1	1	0	0	0	0	0	0	0	0	1	65	35	39	2.5	20	NA	3	4	2	2	3	3	1	1
>>> 2	2	1	2
>>> VX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	1	1	0	0	1	1	0	0	0	0	0	1	0	0	0	0	0	0	0	0	1
>>> 0	0	0	0	0	1	0	0	1	1	0	0	0	0	0	0	0	0	1	85	10.5	19.5	1.5	13.5	NA	5	5	2	3	3
>>> 3	1	1	2	2	2	2
>>> WX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	0	1	0	1	1	1	0	0	0	0	0	1	1	0	0	0	0	0	0	0	1
>>> 0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	0	0	0	1	155	18	30	2	17.5	NA	5	5	2	3	3	3	1
>>> 1	1	2	2	3
>>> XX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	0	1	0	1	0	1	0	0	0	0	0	1	0	0	0	0	0	0	0	0	1
>>> 0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	0	0	0	1	90	10.5	25	1	19	NA	5	5	2	2	3	3	1	1
>>> 1	1	2	3
>>> YX	1	1	0	0	1	0	0	1	NA	NA	NA	0	0	0	0	1	0	0	1	1	1	1	0	0	0	1	0	1	0	0	0	0	0
>>> 0	1	0	0	1	0	0	1	0	0	1	1	0	0	0	0	0	0	0	0	1	NA	NA	30	2.5	20.25	NA	3	3	2	2
>>> 3	3	1	1	2	2	1	1
>>> ZX	1	1	0	0	1	0	0	1	0	0	0	0	0	0	0	1	0	0	1	0	0	1	0	0	0	0	0	1	0	0	0	1	1	0	0
>>> 0	0	0	0	0	1	0	0	0	0	0	1	0	0	0	0	0	0	1	105	25	37.5	1	37.5	2.25	5	5	2	3	3
>>> 3	1	1	1	1	2	2
>>> AY	0	1	1	0	1	1	1	0	1	0	0	0	0	0	0	1	0	1	1	0	0	1	0	1	0	1	0	0	0	0	0	0	0	0	1
>>> 1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0	1	0	0	85	6.5	11.5	3	11.5	3.25	5	5	2	2	3
>>> 4	1	1	1	2	2	4
>>> BY	0	0	1	0	1	0	1	0	0	1	0	0	0	0	0	1	0	1	0	1	0	1	0	0	1	0	1	0	0	0	0	0	1	1	0
>>> 0	0	1	0	0	1	0	0	0	0	0	1	1	0	0	0	0	1	0	38	10	6.5	8	3	2.5	4	5	2	2	2	3	1	1
>>> 1	2	2	3
>>> CY	0	1	0	0	0	1	1	0	1	0	0	0	1	1	1	1	0	1	0	0	1	0	0	1	1	0	0	0	0	0	1	0	1	1	1
>>> 1	1	1	0	0	0	0	0	0	0	0	1	0	1	0	0	1	0	0	15	3.5	5	1.5	3.25	3.5	5	5	2	3	2	2
>>> 1	1	1	1	2	2
>>> DY	0	1	0	0	0	1	0	1	0	1	0	0	0	0	0	1	0	0	1	0	0	1	0	NA	NA	NA	NA	NA	NA	NA	NA
>>> NA	NA	NA	NA	NA	1	0	0	0	0	0	0	0	0	1	0	0	1	0	0	1	0	0	70	20	NA	NA	5.5	3.5	5
>>> 5	3	3	3	3	3	3	1	1	9	9
>>> EY	0	0	0	1	1	0	0	1	1	0	0	0	0	0	0	1	0	1	0	0	1	0	0	0	1	0	0	0	0	0	0	0	1	0	0
>>> 0	0	0	0	0	1	0	0	0	0	0	0	0	1	0	0	0	1	0	20	7	8	25	5.5	3.25	3	3	3	3	3	3	1	1
>>> 1	1	2	2
>>> FY	0	0	0	1	1	0	0	1	0	1	0	0	0	0	0	1	0	0	1	0	1	0	0	0	1	0	1	0	0	0	0	0	0	1	1
>>> 1	1	0	0	0	1	0	0	0	0	0	1	0	1	0	0	0	1	0	150	25	13	24	11.5	4.5	5	5	3	3	4	4
>>> 1	1	1	1	5	6
>>> GY	0	0	0	1	1	0	0	1	1	0	0	0	0	0	0	1	0	0	1	0	1	0	0	0	1	0	1	0	0	0	0	0	1	0	0
>>> 0	0	0	0	0	1	0	0	0	1	0	0	0	0	0	0	0	1	0	50	15	12.5	17.5	8.5	5.75	3	3	3	3	2
>>> 3	1	1	1	1	2	3
>>> HY	0	1	0	0	0	1	0	1	0	1	0	0	0	0	0	1	0	1	0	0	1	0	0	0	1	0	0	0	0	0	0	0	0	1	0
>>> 1	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	1	0	110	15	9.5	7.5	11	3.35	5	5	3	3	4	4
>>> 3	3	1	1	4	5
>>> JY	0	0	0	1	1	0	0	1	1	1	0	0	1	1	0	0	0	1	0	1	0	0	0	0	0	1	0	1	0	0	0	0	1	0	0
>>> 0	0	1	0	0	0	1	0	0	0	0	0	1	0	0	0	0	1	0	60	11.5	10	30	3.25	3.75	3	3	2	2	1
>>> 1	1	1	1	1	2	3
>>> KY	0	0	0	1	1	0	0	1	NA	NA	NA	1	0	1	0	0	1	0	1	0	1	1	0	1	1	0	1	0	0	0	0	0	0
>>> 0	1	0	0	1	1	0	0	0	0	0	0	0	0	1	0	0	0	1	0	1	NA	NA	6.5	23	2.25	1	1	2	2	2	3
>>> 3	1	1	2	2	2	2
>>> LY	0	0	1	0	1	0	0	1	0	1	0	0	0	0	1	0	0	1	0	1	1	0	0	0	1	0	1	0	0	0	0	0	1	0	0
>>> 0	0	1	0	0	0	0	0	0	0	0	1	1	0	0	0	1	0	0	52.5	20	11	5	6.25	4.25	2	2	2	2	3	3
>>> 1	1	1	1	2	4
>>> MY	0	1	1	0	0	1	0	1	0	1	0	0	1	1	0	0	0	0	1	0	1	0	0	0	0	0	1	1	0	0	0	0	1	0	0
>>> 0	0	0	1	0	0	1	0	0	0	0	1	0	0	0	0	1	0	0	60	15	3	15	1.5	1.25	5	5	2	2	2	2	1
>>> 1	1	1	6	6
>>> NY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	1	1	0	1	1	0	1	1	0	0	0	1	1	0	0	1	0	0	1	0	0
>>> 0	0	0	0	0	1	0	0	0	0	0	1	0	0	0	0	1	0	0	50	14	3.75	25	2.85	2.4	5	5	2	2	1	2
>>> 1	1	1	1	5	6
>>> OY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	0	1	0	0	1	0	0	1	0	0	0	0	1	0	0	1	0	0	1	0	1
>>> 0	0	0	0	0	1	0	0	0	0	0	0	1	0	0	0	1	0	0	45	14	4	15	2.75	1.75	5	5	2	2	2	3	1
>>> 1	2	3	5	5
>>> PY	0	0	1	1	0	1	0	1	0	1	0	0	0	0	0	1	0	0	1	0	0	1	0	0	0	0	1	0	0	1	0	0	1	1	1
>>> 0	0	0	0	0	1	0	0	0	0	0	0	1	0	0	0	1	0	1	60	18.5	3.75	15	2.75	2.1	5	5	2	2	2
>>> 3	1	1	1	2	4	6
>>> QY	0	0	1	0	0	1	0	1	0	1	0	0	0	1	1	1	0	0	1	1	0	1	0	0	1	1	1	0	0	0	0	0	0	1	1
>>> 0	0	0	0	0	1	0	0	0	0	0	1	1	0	0	0	0	0	1	290	90	8.5	22.5	2.75	2.25	5	5	2	2
>>> 2	3	1	1	1	2	7	7
>>> RY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	0	1	0	0	1	0	0	1	0	0	0	0	1	0	0	1	0	0	1	1	1
>>> 0	0	0	0	0	1	0	0	0	0	0	0	1	0	0	0	0	1	0	55	15.5	7.5	14	7	2.25	5	5	2	2	3	3
>>> 1	1	2	3	2	4
>>> SY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	0	1	0	0	1	1	0	0	0	0	0	0	0	0	0	1	0	0	1	0	0
>>> 0	0	0	0	0	1	0	0	0	0	0	1	1	0	0	0	0	1	0	55	20	5.5	30	4.5	2.5	5	5	2	2	3	3	1
>>> 1	1	1	4	5
>>> TY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	0	1	0	0	1	0	1	1	0	0	0	0	1	0	0	1	0	0	1	1	0
>>> 0	0	0	0	0	1	0	0	0	0	0	1	0	0	0	0	1	0	0	40	15	4.5	25	2.75	1.75	5	5	2	2	3	3
>>> 1	1	1	1	4	6
>>> UY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	1	1	0	0	1	1	0	0	0	0	0	1	1	0	0	1	0	0	1	0	1
>>> 0	0	1	0	1	1	0	0	0	0	0	1	1	0	0	0	0	1	0	200	27.5	6.5	25	2.45	2.25	5	5	2	2
>>> 2	3	1	1	1	2	7	7
>>> VY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	1	1	0	0	1	1	0	1	0	0	1	0	1	0	0	1	0	0	1	1	1
>>> 0	0	0	0	0	1	0	0	0	0	0	0	1	1	0	0	0	1	0	135	17.5	5.5	17.5	2.75	2.25	5	5	2
>>> 2	2	3	1	1	1	2	5	7
>>> WY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	0	1	0	0	1	1	0	0	0	0	1	0	1	0	0	1	1	0	1	0	1
>>> 1	0	0	0	0	1	0	0	0	0	0	0	1	0	0	0	1	0	1	240	35	5.5	14	3.25	2.75	5	5	2	2	2
>>> 3	1	1	1	2	7	7
>>> XY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	1	1	0	0	1	1	0	0	0	0	0	1	0	0	0	1	0	0	1	0	0
>>> 0	0	0	0	1	1	0	0	0	0	0	0	1	0	0	0	1	0	0	175	27.5	4	10.5	2.5	1.875	5	5	2	2
>>> 2	2	1	1	1	1	6	7
>>> YY	0	0	1	0	0	1	0	1	0	1	0	0	0	0	1	1	0	0	1	1	0	1	0	0	1	1	1	0	0	0	0	0	0	0	1
>>> 0	0	0	0	0	1	0	0	0	0	0	1	1	0	0	0	0	0	1	230	42.5	5.6	25	2.5	2.5	5	5	2	2	2
>>> 2	1	1	1	2	5	7
>>> ZY	0	1	0	0	0	1	0	1	0	1	0	0	0	0	1	0	0	1	0	0	0	1	0	0	0	0	0	0	0	0	1	0	0	0	0
>>> 1	1	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	1	115	35	10.5	20	7.5	6.5	5	5	1	1	3	3
>>> 1	1	1
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 	
>>> 
>> 
>> 
> 
> 


-----
The art of living is more like wrestling than dancing.
(Marcus Aurelius)
-- 
View this message in context: http://www.nabble.com/Problems-using-hetcor-%28polycor%29-tp18867343p18868835.html
Sent from the R help mailing list archive at Nabble.com.

More information about the R-help mailing list