[R] Help using Cast (Text) Version

[Ista Zahn]

Hi Steve,
It's still not clear to me what you want. Please give a minimal
example so I can understand what you're trying to do.

-Ista

On Sun, Jan 17, 2010 at 11:56 AM, Steve Sidney <sbsidney at mweb.co.za> wrote:
> David
>
> Thanks, I'll try that......but no what I need is the total (1's) for each of
> the rows, labelled 1-6 at the top of each col in the table provided.
>
> What I guess I am not sure of is how to identify the col after the melt and
> cast.
>
> Steve
>
> ----- Original Message ----- From: "David Winsemius"
> <dwinsemius at comcast.net>
> To: "Steve Sidney" <sbsidney at mweb.co.za>
> Cc: <r-help at r-project.org>
> Sent: Sunday, January 17, 2010 4:39 PM
> Subject: Re: [R] Help using Cast (Text) Version
>
>
>>
>> On Jan 17, 2010, at 5:31 AM, Steve Sidney wrote:
>>
>>> Sorry to repeat the meassage, not sure if the HTML version has been
>>> received - Apologies for duplication
>>>
>>> Dear list
>>>
>>> I am trying to count the no of occurances in a column of a data  frame
>>> and there is missing data identifed by NA.
>>>
>>> I am able to melt and cast the data correctly as well as sum the
>>> occurances using margins and sum.
>>>
>>> Here are the melt and cast commands
>>>
>>> bw = melt(res, id=c("lab","r"), "pf_zbw")
>>> b = cast(bw, lab ~ r, sum, margins = T)
>>>
>>> Sample Data (before using sum and margins)
>>>
>>>   lab  1  2  3  4  5  6
>>> 1  4er66  1 NA  1  0 NA  0
>>> 2  4gcyi  0  0  1  0  0  0
>>> 3  5d3hh  0  0  0 NA  0  0
>>> 4  5d3wt  0  0  0  0  0  0
>>> .
>>> . lines deleted to save space
>>> .
>>> 69 v3st5 NA NA  1 NA NA NA
>>> 70 a22g5 NA  0 NA NA NA NA
>>> 71 b5dd3 NA  0 NA NA NA NA
>>> 72 g44d2 NA  0 NA NA NA NA
>>>
>>> Data after using sum and margins
>>>
>>>   lab 1 2 3 4 5 6 (all)
>>> 1  4er66 1 0 1 0 0 0     2
>>> 2  4gcyi 0 0 1 0 0 0     1
>>> 3  5d3hh 0 0 0 0 0 0     0
>>> 4  5d3wt 0 0 0 0 0 0     0
>>> 5  6n44r 0 0 0 0 0 0     0
>>> .
>>> .lines deleted to save space
>>> .
>>> 70 a22g5 0 0 0 0 0 0     0
>>> 71 b5dd3 0 0 0 0 0 0     0
>>> 72 g44d2 0 0 0 0 0 0     0
>>> 73 (all) 5 2 4 3 5 7    26
>>>
>>> Uisng length just tells me how many total rows there are.
>>
>>
>>> What I need to do is count how many rows there is valid data, in  this
>>> case either a one (1) or a zero (0) in b
>>
>> I'm guessing that you mean to apply that test to the column in b  labeled
>> "(all)" . If that's the case, then something like (obviously  untested):
>>
>> sum( b$'(all)' == 1 | b$'(all)' == 0)
>>
>>
>>
>>>
>>> I have a report to construct for tomorrow Mon so any help would be
>>> appreciated
>>>
>>> Regards
>>> Steve
>>
>> David Winsemius, MD
>> Heritage Laboratories
>> West Hartford, CT
>>
>>
>
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>



-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org