Iurie -
The help file for both functions has a "Values" section
that describes in detail exactly what the function returns.
In both cases, you'll see there is a component named
"statistic", which is what you want.
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Tue, 25 May 2010, Iurie Malai wrote:
Hi,
I use two similar scripts to put p-values of shapiro.test and, respectively,
of wilcox.test in a table:
a)
d <- data.frame(dataset$GroupFactor, dataset[2:11])
# p-values for the shapiro test (by levels of GroupFactor)
with(d, aggregate(d[,-1], list(d[,1]), FUN = function(x)
shapiro.test(x)$p.value))
b)
d <- data.frame(dataset$GroupFactor, dataset[2:11])
with(d, aggregate(d[,-1], list(d[,1]), FUN = function(x)
wilcox.test(x)$p.value))
How to replace the p-values with values of "W" (for Shapiro-Wilk test and,
respectively, for Wilcoxon-Mann-Whitney U test)?
Example of output:
---------------------------
with(d, aggregate(d[,-1], list(d[,1]), FUN = function(x)
shapiro.test(x)$p.value))
Group.1 1 2 3 4 5
6 7 8 IA IV
1 town 0.0030465882 0.002068448 0.01129771 7.606061e-06 1.189380e-03
0.001396341 0.009097276 6.824918e-05 0.4877525 0.08005584
2 country 0.0002436141 0.005135004 0.01540923 2.469611e-06 1.372854e-05
0.001517259 0.052174738 1.057227e-06 0.3172002 0.15745973
Regards,
Iurie Malai
Department of Psychology
Ion Creanga Moldova Pedagogical State University - www.upsm.md
http://en.wikipedia.org/wiki/Ion_Creang%C4%83_Pedagogical_State_University
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