[R] Fw: PROBLEM - - COMPARING AND COMBINING two DATASETS

[Gabor Grothendieck]

Try this:

xtabs(B ~ factor(A, seq(max(A))))


On Thu, Aug 27, 2009 at 8:26 AM, Maithili Shiva<maithili_shiva at yahoo.com> wrote:
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> Dear Sirs,
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> At the outset I sincerely apologize for reproducing my query to you. I also thank all of you for the solution you had provided. It has worked on the actual data I am working with.
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> However, there is this peculiar problem which I had realized only after I had obtained my results.
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> e.g. in the example I had attached
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> A <- c(2, 2, 1, 3, 7, 3, 3, 1, 14, 7, 31)
> B <- c(0.0728,0.9538,4.0140,0.0020,2.5593,0.1620,2.513,0.3798, .0033,0..2282, 0.1614)
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> tapply( B, A, sum)
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> I get R output as –
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>  1          2          3            7            14          31
> 4.3938   1.0266   2.6770    2.7875    0.0033    0.1614
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> However, my requirement is I should get the output as
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> 1          2          3         4  5  6  7         8  9 …. 14 ………..31
> 4.3938 1.0266  2.6770   0  0  0  2.7875  0  0 ..0.0033 .. 0.161
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> i.e. my output should include the values 4, 5, 6, etc. which are not part of dataset A and the corresponding totals in B (which are anyways 0’s). I need this for my further analysis. Its possible for me to add these 0’s manually, however when the dataset is large, its not practical.
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> I am attaching herewith an excel file. I will be grateful if you can guide me.
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> Thanks in advance
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> Maithili
> start: 2009-08-18 end: 0000-00-00
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