R help - Mar 2011 - Is there any Command showing correlation of all variables in a dataset?

Thanks in advance.

I want to derive correlations of variables in a dataset

Specifically

library(Ecdat)
data(Housing)
attach(Housing)
cor(lotsize, bathrooms)

this code results only the correlationship between two variables.
But I want to examine all the combinations of variables in this dataset.
And I will finally make a table in Latex.

How can I test correlations for all combinations of variables?
with one simple command?


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----------------------------------------
> Date: Tue, 1 Mar 2011 02:41:00 -0800
> From: joongi at hanmail.net
> To: r-help at r-project.org
> Subject: [R] Is there any Command showing correlation of all variables in a
dataset?
>
>
> Thanks in advance.
>
> I want to derive correlations of variables in a dataset
>
> Specifically
>
> library(Ecdat)
> data(Housing)
> attach(Housing)
> cor(lotsize, bathrooms)
>
> this code results only the correlationship between two variables.
> But I want to examine all the combinations of variables in this dataset.
> And I will finally make a table in Latex.
>
> How can I test correlations for all combinations of variables?
> with one simple command?
>
This appears to work as expected although I don't have enough
intuition to know if these numbers are plausible beyond rough
guess( diag of course is one LOL), 
> df<-data.frame(a=rnorm(100), b=runif(100),c=runif(100)+rnorm(100))
> str(df)
'data.frame':?? 100 obs. of? 3 variables:
?$ a: num? 0.1841 0.2296 -1.2251 0.0898 -0.961 ...
?$ b: num? 0.586 0.343 0.821 0.41 0.352 ...
?$ c: num? -0.373 2.225 0.102 1.186 -0.737 ...
> cor(df)
?????????? a?????????? b?????????? c
a 1.00000000? 0.07710107? 0.11088579
b 0.07710107? 1.00000000 -0.02424471
c 0.11088579 -0.02424471? 1.00000000
> ?cor
> df<-data.frame(a=.1*rnorm(100),
b=(1:100)/100,c=(1:100)/100+.1*rnorm(100))
> cor(df)
???????????? a?????????? b??????????? c
a? 1.000000000 -0.01970874 -0.003665239
b -0.019708737? 1.00000000? 0.950375445
c -0.003665239? 0.95037544? 1.000000000
>

?cor  answers that question.  If Housing is a dataframe, cor(Housing) should do
it.  Surprisingly, ??correlation doesn't point you to ?cor.

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of JoonGi
Sent: Tuesday, March 01, 2011 5:41 AM
To: r-help at r-project.org
Subject: [R] Is there any Command showing correlation of all variables in a
dataset?


Thanks in advance.

I want to derive correlations of variables in a dataset

Specifically

library(Ecdat)
data(Housing)
attach(Housing)
cor(lotsize, bathrooms)

this code results only the correlationship between two variables.
But I want to examine all the combinations of variables in this dataset.
And I will finally make a table in Latex.

How can I test correlations for all combinations of variables?
with one simple command?


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On Tue, Mar 1, 2011 at 11:41 AM, JoonGi <joongi at hanmail.net>
wrote:
>
> Thanks in advance.
>
> I want to derive correlations of variables in a dataset
>
> Specifically
>
> library(Ecdat)
> data(Housing)
> attach(Housing)
> cor(lotsize, bathrooms)
>
> this code results only the correlationship between two variables.
> But I want to examine all the combinations of variables in this dataset.
> And I will finally make a table in Latex.
>
> How can I test correlations for all combinations of variables?
> with one simple command?
>
See Rcmdr for an example.
Liviu

>
> --
> View this message in context:
http://r.789695.n4.nabble.com/Is-there-any-Command-showing-correlation-of-all-variables-in-a-dataset-tp3329599p3329599.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


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