On 4 May 2011 15:32, peter dalgaard pda...@gmail.com wrote:
On May 4, 2011, at 15:11 , JP wrote:
Peter thanks for the fantastically simple and understandable explanation...
To sum it up... to find the z values of a number of pairwise wilcox
tests do the following:
# pairwise tests with
On May 5, 2011, at 10:58 , JP wrote:
On 4 May 2011 15:32, peter dalgaard pda...@gmail.com wrote:
On May 4, 2011, at 15:11 , JP wrote:
Peter thanks for the fantastically simple and understandable explanation...
To sum it up... to find the z values of a number of pairwise wilcox
tests
Thanks once again Peter, I understand your points -- I fiddled and
googled and read some more and found an eas(ier) route:
library(coin)
t - wilcoxsign_test(a ~ b, alternative = two.sided, distribution =
exact()) # This is equivalent to paired wilcox.test
pval - pvalue(t)
sweet.zscore -
On 3 May 2011 20:50, peter dalgaard pda...@gmail.com wrote:
On Apr 28, 2011, at 15:18 , JP wrote:
I have found that when doing a wilcoxon signed ranked test you should report:
- The median value (and not the mean or sd, presumably because of the
underlying potential non normal
On May 4, 2011, at 11:03 , JP wrote:
On 3 May 2011 20:50, peter dalgaard pda...@gmail.com wrote:
On Apr 28, 2011, at 15:18 , JP wrote:
I have found that when doing a wilcoxon signed ranked test you should
report:
- The median value (and not the mean or sd, presumably because of
Peter thanks for the fantastically simple and understandable explanation...
To sum it up... to find the z values of a number of pairwise wilcox
tests do the following:
# pairwise tests with bonferroni correction
x - pairwise.wilcox.test(a, b, alternative=two.sided,
p.adj=bonferroni, exact=F,
On May 4, 2011, at 15:11 , JP wrote:
Peter thanks for the fantastically simple and understandable explanation...
To sum it up... to find the z values of a number of pairwise wilcox
tests do the following:
# pairwise tests with bonferroni correction
x - pairwise.wilcox.test(a, b,
Thanks Uwe,
How do I calculate the Z score and r value - please (once I have the p values)?
Many Thanks
JP
2011/5/2 Uwe Ligges lig...@statistik.tu-dortmund.de:
To get the statsitics, you will have to run each wilcox.test manually. the
pairwise... version just extracts the p-values and
On 03.05.2011 10:33, JP wrote:
Thanks Uwe,
How do I calculate the Z score and r value - please (once I have the p values)?
Actually you calculate the p value from the statistics rathger than vice
versa. And pairwise.wilcox.test uses wilcox.test to calculate the
separate tests and adjusts
On Apr 28, 2011, at 15:18 , JP wrote:
I have found that when doing a wilcoxon signed ranked test you should report:
- The median value (and not the mean or sd, presumably because of the
underlying potential non normal distribution)
- The Z score (or value)
- r
- p value
...printed
To get the statsitics, you will have to run each wilcox.test manually.
the pairwise... version just extracts the p-values and adjusts them.
Uwe Ligges
On 28.04.2011 15:18, JP wrote:
Hi there,
I am trying to do multiple pairwise Wilcoxon signed rank tests in a
manner similar to:
a-
Hi there,
I am trying to do multiple pairwise Wilcoxon signed rank tests in a
manner similar to:
a - c(runif(1000, min=1,max=50), rnorm(1000, 50), rnorm(1000, 49.9,
0.5), rgeom(1000, 0.5))
b - c(rep(group_a, 1000), rep(group_b, 1000), rep(group_c,
1000), rep(group_d, 1000))
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