(no subject)
Reading the posting guide will tell you (among other things) to : a) use a sensible subject line b) give a reproducible example when possible See other comments below.
On Wed, 2004-11-03 at 19:04, fang lai wrote:
Hi there, When I ran the wilcox.exact test, it always shows "number of items to replace is not a multiple of replacement length" However, according to the help it seems to be able to handle sample of different size.
I think the error refers to incorrect lengths during assignment. See example below.
aaa <- matrix( 1:4, nr=2 ) aaa
[,1] [,2] [1,] 1 3 [2,] 2 4
aaa[1, ]
[1] 1 3
aaa[1, ] <- 1:3
Error in "[<-"(`*tmp*`, 1, , value = 1:3) :
number of items to replace is not a multiple of replacement length
Or you might be trying something like
aaa <- matrix( 1:4, nr=2 ) aaa[1, ] <- wilcox.test( 1:3, 1:10 )
Error in "[<-"(`*tmp*`, 1, , value = wilcox.test(1:3, 1:10)) :
number of items to replace is not a multiple of replacement length
Wilcoxon and all other two-group test statistics (when pairing is not
involved) can handle groups of different size.
Try wilcox.test( 1:3, 1:10 ).
To extract p-value only, do wilcox.test( 1:3, 1:10 )$p.value
What does this message indicate, and will it cause a problem of the resulting p-value?
Not directly. You could be expecting p-values to be in, say the 5th column, but it might be stored elsewhere. But in your case I think the results will not be stored anyway.
Also, when I run the ks.test(), it shows sometimes that cannot compute correct p-values with ties in: ks.test(income.perm[(data[, 3] == 59) & (data[, 2] == 1)], income.perm[(data[, ...
Is this a warning or an error ? There is a distinction.
And sometime it shows results and sometimes it just
return NULL. When it shows the results, does it mean
that it had some kind of continuity correction or
other adjustment so that I could believe the results?
Many thanks,
Fang
=====
Lai, Fang
PhD candidate
University of California, Berkeley
Department of Agricultural and Resource Economics
314 Giannini Hall, Berkeley, CA 94720-3310
tel: (510) 643 - 5421(O)
(510) 847 - 9811(Cell)
fax: (510) 643 - 8911
email: lai at are.berkeley.edu
http://www.are.berkeley.edu/jobmarket/fang.html
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