On 24/02/2015 9:11 AM, Linh Nguyen Vaccarello wrote:> I am very new to R and I'm trying to increase my decimal places (from 2
to
> 4) for this code:
>
>> with(longitudinal, pairwise.wilcox.test(DV, Time,
> p.adjust.method="holm",
> paired=TRUE))
>
> Right now the output is:
>
> Pairwise comparisons using Wilcoxon signed rank test
>
> data: DV and Time
>
> yr15 yr2 yr5
> yr2 0.03 - -
> yr5 0.03 0.05 -
> yr8 0.03 0.05 0.03
Many functions in R produce objects with a class, and there are special
methods to print many classes. In the case of pairwise.wilcox.test the
object produced is of class "pairwise.htest". You can see the code
using
stats:::print.pairwise.htest
and you'll see it hard-codes 2 significant digits. (Which surprises me
a bit, but I guess your p-values are all 0.030 and 0.050.)
You can edit the definition for a temporary change:
print.pairwise.htest <- function (x, digits = 5, ...)
{
cat("\n\tPairwise comparisons using", x$method, "\n\n")
cat("data: ", x$data.name, "\n\n")
pp <- format.pval(x$p.value, digits, na.form = "-")
attributes(pp) <- attributes(x$p.value)
print(pp, quote = FALSE, ...)
cat("\nP value adjustment method:", x$p.adjust.method,
"\n")
invisible(x)
}
Your definition of this method will override the default one, so
defining that function is enough, R will call it for printing.
Duncan Murdoch>
> I have tried various codes and they didn't work:
> options(digits=4)
> with(longitudinal, pairwise.wilcox.test(DV, Time,
> p.adjust.method="holm",
> paired=TRUE))
>
>> with(longitudinal, pairwise.wilcox.test(DV, Time,
> + p.adjust.method="holm",
> + paired=TRUE),
> + options(digits=4))
>
>> with(longitudinal, pairwise.wilcox.test(DV, Time,
> + p.adjust.method="holm",
> + paired=TRUE,
> + digits=4))
>
>> with(longitudinal, pairwise.wilcox.test(DV, Time,
> + p.adjust.method="holm",
> + paired=TRUE),
> + signif(digits=4))
>
> thanks,
> Linh
>
> [[alternative HTML version deleted]]
>
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