Re: [R] expand.grid function

From: dxc13 <dxc13_at_health.state.ny.us>
Date: Sun, 23 Dec 2007 20:41:16 -0800 (PST)

Yes, that works perfectly. Thank you for your help!

Derek

Charilaos Skiadas-3 wrote:

> 
> Hi Derek,
> On Dec 23, 2007, at 10:59 PM, dxc13 wrote:
> 

>>
>> useR's,
>>
>> I have used expand.grid() several times and like the results it
>> gives me. I
>> am now trying something with it that I have not been able to get to
>> work.
>> For any n column matrix I would like to run this function on those
>> n columns
>> and store the results.
>> For example, if my matrix has 1 column then this is just expand.grid
>> (x =
>> column1). If my matrix has two columns, then I want expand.grid(x =
>> column1, y = column2), and so on for any number of columns...
>>
> 
> Does this do what you want  (x is the matrix)?
> 
> do.call(expand.grid, as.data.frame(x))
> 
> 

>> In a program I am writing, the user can specify any matrix. Does
>> anyone
>> know of a way for R to calculate this based on what the input
>> matrix is?
>> e.g. if this user gives a 3 column matrix, I want to be able to
>> perform
>> expand.grid() on these 3 columns without having to hard code it b/c
>> I want
>> to have this small function embedded in my code and the results
>> stored as a
>> variable.
>>
>> If this isn't clear, I can try to be more detailed. Thank you for any
>> thoughts.
>>
>> Derek
> 
> Haris Skiadas
> Department of Mathematics and Computer Science
> Hanover College
> 
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> 

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Received on Mon 24 Dec 2007 - 04:45:38 GMT

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