[R] cbind question, please

[Erin Hodgess]

These are great! Thank you!



On Thu, Apr 23, 2015 at 7:14 PM, William Dunlap <wdunlap at tibco.com> wrote:

> You could do something tricky like
>   > do.call(cbind, lapply(big.char, as.name))
>        dog cat tree
>   [1,]   1   2    5
>   [2,]   2   3    6
>   [3,]   3   4    7
> but you are usually better off creating these things as part of a list
> and passing that to do.call(cbind, list).
>
> There is a slight danger of using do.call with cbind.  If your
> list has a component with the unlikely name 'deparse.level',
> then that will be taken as cbind's deparse.level argument,
> not as a column of the matrix to be made.
>
>
> Bill Dunlap
> TIBCO Software
> wdunlap tibco.com
>
> On Thu, Apr 23, 2015 at 3:41 PM, Erin Hodgess <erinm.hodgess at gmail.com>
> wrote:
>
>> Hello!
>>
>> I have a cbind type question, please:  Suppose I have the following:
>>
>> dog <- 1:3
>> cat <- 2:4
>> tree <- 5:7
>>
>> and a character vector
>> big.char <- c("dog","cat","tree")
>>
>> I want to end up with a matrix that is a "cbind" of dog, cat, and tree.
>> This is a toy example.  There will be a bunch of variables.
>>
>> I experimented with "do.call", but all I got was
>> 1
>> 2
>> 3
>>
>> Any suggestions would be much appreciated.  I still think that do.call
>> might be the key, but I'm not sure.
>>
>> R Version 3-1.3, Windows 7.
>>
>> Thanks,
>> Erin
>>
>>
>> --
>> Erin Hodgess
>> Associate Professor
>> Department of Mathematical and Statistics
>> University of Houston - Downtown
>> mailto: erinm.hodgess at gmail.com
>>
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>>
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>>
>
>


-- 
Erin Hodgess
Associate Professor
Department of Mathematical and Statistics
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com

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