[R] Correlation Matrix - p value?

[R. Michael Weylandt <michael.weylandt@gmail.com>]

Just pointing out that Jorge wrote 

cor.test

not cor. 

Don't know if you saw that but it should help. 

Michael Weylandt


On Aug 9, 2011, at 8:58 AM, ScottM <scott.mcgrane at abdn.ac.uk> wrote:

> Cheers Jorge,
> 
> I've tried this, but keep getting error messages, relating to either:
> 
> Error: unexpected '$' in "$"
> 
> or
> 
> Error in cor(data, method = "spearman")$p.value :
>  $ operator is invalid for atomic vectors
> 
> Very annoying!
> 
> S
> 
> Scott McGrane MA (Hons), MRes
> SAGES Theme 1 PhD Student
> Northern Rivers Institute
> St Mary's Building
> University of Aberdeen
> 
> http://www.abdn.ac.uk/nri
> ________________________________________
> From: Jorge Ivan Velez [via R] [ml-node+3729864-606556654-252737 at n4.nabble.com]
> Sent: 09 August 2011 01:55 PM
> To: Mcgrane, Scott
> Subject: Re: Correlation Matrix - p value?
> 
> ?cor.test
> cor.test(x, y, method = "spearman")$p.value
> 
> HTH,
> Jorge
> 
> 
> On Tue, Aug 9, 2011 at 8:44 AM, ScottM <> wrote:
> 
>> Hello all,
>> 
>> I've run a Spearman's Rank test to discern relationships between landscape
>> characteristics and a specific aspect of river behaviour.
>> 
>> I've executed a correlation matrix between the one dependent variable and
>> all of the predictors, which gives me a nice output of Spearman's Rho
>> values.
>> 
>> However, I also need to somehow find the "p" value, to assess the strength
>> of relationship.
>> 
>> Conducting a simple correlation between 2 variables using the:
>> 
>> cor(var1, var2, method="spearman")
>> 
>> command gives me an output with both the Rho and P value, but the default
>> output of the matrix is simply the Rho value.  I've tried using
>> summary(result), but it just produces the percentile/max/min values.
>> 
>> Any help appreciated.
>> 
>> Cheers,
>> 
>> S.
>> 
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