[R] Filter Values Out of R Output
Chuck Cleland
ccleland at optonline.net
Wed Sep 3 20:31:07 CEST 2008
On 9/3/2008 12:20 PM, Tobias Binz wrote:
> Hi list
>
> Is there a possibility to filter certain values out of an R output?
>
> In my case: I want to create a vector of p-values in a for loop that
> invokes for every increment cor.test() on two vectors.
>
> I haven't found a way yet to tell cor.test() to only return the p-values
> instead of the whole text.
str() will compactly display the structure of an object, including the
result of calling cor.test(). Once you know the structure, you can
isolate and save a component.
x <- c(44.4, 45.9, 41.9, 53.3, 44.7, 44.1, 50.7, 45.2, 60.1)
y <- c( 2.6, 3.1, 2.5, 5.0, 3.6, 4.0, 5.2, 2.8, 3.8)
str(cor.test(x, y, method = "kendall", alternative = "greater"))
List of 8
$ statistic : Named num 26
..- attr(*, "names")= chr "T"
$ parameter : NULL
$ p.value : num 0.0597
$ estimate : Named num 0.444
..- attr(*, "names")= chr "tau"
$ null.value : Named num 0
..- attr(*, "names")= chr "tau"
$ alternative: chr "greater"
$ method : chr "Kendall's rank correlation tau"
$ data.name : chr "x and y"
- attr(*, "class")= chr "htest"
cor.test(x, y, method = "kendall", alternative = "greater")$p.value
[1] 0.05971947
> Thanks,
> Tobi
>
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--
Chuck Cleland, Ph.D.
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