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

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