R help - May 2006 - Correlation matrix

Dear R users,

Suppose I have a 4*5 data frame like this:

Date         x1       x2      x3     x4
1/1/2004    100       22      12     34
2/1/2004    33        -22     33     12
3/1/2004    12        12      -11    5
4/1/2004    1         223     22     1

Now I want to get a correlation matrix for this dataset excluding column-1
and column-3 i.e. I want to get a correlation matrix for variables x1, x3,
x4. I know that if this dataframe has only three columns containing x1, x3
and x4 instead of five columns then I can use "cor" function. If
anyone give
me any code for doing this I will be very grateful

Thanks,
Arun

	[[alternative HTML version deleted]]

Arun Kumar Saha wrote:
> Dear R users,
> 
> Suppose I have a 4*5 data frame like this:
> 
> Date         x1       x2      x3     x4
> 1/1/2004    100       22      12     34
> 2/1/2004    33        -22     33     12
> 3/1/2004    12        12      -11    5
> 4/1/2004    1         223     22     1
> 
> Now I want to get a correlation matrix for this dataset excluding column-1
> and column-3 i.e. I want to get a correlation matrix for variables x1, x3,
> x4. I know that if this dataframe has only three columns containing x1, x3
> and x4 instead of five columns then I can use "cor" function. If
anyone give
> me any code for doing this I will be very grateful
>
cor(dat[,-c(1,3)]

Uwe Ligges

> Thanks,
> Arun
> 
> 	[[alternative HTML version deleted]]
> 
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