[R] accessing an object with a variable ?

[Marius 't Hart]

Does this help you?

http://stackoverflow.com/questions/3971844/access-variable-value-where-the-name-of-variable-is-stored-in-a-string-in-r

On 14-01-18 04:21 PM, ce wrote:
> I want access and object , its name is in an variable :
>
> require(xts)
> data(sample_matrix)
>
> head(sample_matrix)
>                 Open     High      Low    Close
> 2007-01-02 50.03978 50.11778 49.95041 50.11778
> 2007-01-03 50.23050 50.42188 50.23050 50.39767
> 2007-01-04 50.42096 50.42096 50.26414 50.33236
> 2007-01-05 50.37347 50.37347 50.22103 50.33459
> 2007-01-06 50.24433 50.24433 50.11121 50.18112
> 2007-01-07 50.13211 50.21561 49.99185 49.99185
>> assign("a",sample_matrix)
>> head(a)
>                 Open     High      Low    Close
> 2007-01-02 50.03978 50.11778 49.95041 50.11778
> 2007-01-03 50.23050 50.42188 50.23050 50.39767
> 2007-01-04 50.42096 50.42096 50.26414 50.33236
> 2007-01-05 50.37347 50.37347 50.22103 50.33459
> 2007-01-06 50.24433 50.24433 50.11121 50.18112
> 2007-01-07 50.13211 50.21561 49.99185 49.99185
>
>
> But following doesn't work:
>
> b="sample_matrix"
> assign("a",b)
>
>> a
> [1] "sample_matrix"
>
> how I can access sample_matrix data when I have only b variable ?
>
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