[R] adding tables [partial solution]

[Roy Mendelssohn]

Is this what you are after?

http://www.statmethods.net/management/merging.html

-Roy
On Dec 9, 2013, at 4:09 PM, Ross Boylan <ross at biostat.ucsf.edu> wrote:

> Answering myself...
> On Mon, 2013-12-09 at 15:59 -0800, Ross Boylan wrote:
>> Can anyone recommend a good way to add tables?
> For count data, which were my main concern, it looks as if tabulate with
> nbins will work.  I'm not sure how this works with a cross-classifying
> factor, which I will also need.  It's possible the factor may have
> missing values in some tabulations as well.
> 
> For the one dimensional case
>> t1 <- tabulate(c(1, 2, 2, 4), nbins=5)
>> t2 <- tabulate(c(2, 3, 5), nbins=5)
>> t1
> [1] 1 2 0 1 0
>> t2
> [1] 0 1 1 0 1
>> t1+t2
> [1] 1 3 1 1 1
> 
>> Ideally I would like
>> t1 <- table(x1)
>> t2 <- table(x2)
>> t1+t2
>> 
>> It t1 and t2 have the same levels this works fine, but I need something
>> that will work even if they differ, e.g.,
>>> t1
>> 
>> 1 2 4 5
>> 2 1 1 1
>>> t2 <- table(c(10, 11, 12, 13))
>>> t1+t2  # apparently does simple vector addition
>> 
>> 1 2 4 5
>> 3 2 2 2
>> whereas I want
>> 1 2 4 5 10 11 12 13
>> 2 1 1 1  1  1  1  1
>> 
> 
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