Darko - Looking at it carefully. Yes, you're right. It's still native
R code function. I know how to proceed now. Thanks.

On Wed, Oct 5, 2011 at 9:22 PM, Roupell, Darko <darko.roup...@cba.com.au> wrote:
> Btw tweaking MatchTradesQuotes should not be an issue and its easy to 
> accommodate any data format that is passed through in xts object.
>
> At least that's what I did with RTAQ package - used it as a shell to create 
> unique functions that suit data format for intra-day tick flow from ASX.
>
>
> Hope this helps.
>
> __________________________________________________
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> Darko Roupell
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> communication does not purport to be a complete statement or summary.
> The information provided has been prepared without considering your 
> objectives, financial situation or needs, and before acting on the 
> information, you should consider its appropriateness to your circumstances. 
> No person should act on the basis of this report without considering and if 
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> Commonwealth Bank of Australia, as a provider of investment, borrowing and 
> other financial services undertakes financial transactions with many 
> corporate entities in Australia. This may include any corporate issuer 
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> have effected or may effect transactions for their own account in any 
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>
> -----Original Message-----
> From: Robert A'gata [mailto:rhelp...@gmail.com]
> Sent: Thursday, 6 October 2011 12:08 PM
> To: Roupell, Darko; r-help@r-project.org; r-sig-fina...@stat.math.ethz.ch
> Subject: Re: [R-SIG-Finance] AsOf join in R
>
> Hi Roupell,
>
> Yes I am aware of RTAQ function matchTradesQuotes. But my time series
> does not follow the TAQ format like they suggest. So I gave it a try
> and find that it doesn't work. In particular, my time series contain
> full level 2 order book and trades. I want to do asof join of the book
> to the trade. Is there any better way? Or I misunderstand anything
> about the RTAQ's function? Thank you.
>
> Robert
>
> On Wed, Oct 5, 2011 at 1:59 AM, Roupell, Darko <darko.roup...@cba.com.au> 
> wrote:
>> na.locf {zoo}, should do a job, also if you look in RTAQ they wrote a 
>> function that looks on previous tick and carries forward value in case its 
>> not available.
>>
>> __________________________________________________
>> Commonwealth Bank
>> Darko Roupell
>> Associate Quantitative Analyst
>> Institutional Banking & Markets
>> Equities Research
>> Darling Park Tower 1
>> Level 23, 201 Sussex Street
>> Sydney, NSW 200
>> P:  +61 2 9117 1254
>> F:  +61 2 9118 1000
>> M: +61 400 170 515
>> E: darko.roup...@cba.com.au
>> Our vision is to be Australia's finest financial services organisation 
>> through excelling in customer service.
>>
>> Email Security
>> This email is sent solely for informational purposes. Hoax emails, commonly 
>> referred to as phishing, can appear to be from the Commonwealth Bank and ask 
>> you to update or confirm details such as client numbers, passwords, personal 
>> identification questions, contact details or account numbers. The 
>> Commonwealth Bank will never send you an email asking you to confirm, update 
>> or reveal your confidential banking information.
>> Important Information
>> Produced by Global Markets Research, a business unit of Commonwealth Bank of 
>> Australia ABN 48 123 123 124 - AFSL 234945 (Commonwealth Bank). This 
>> publication is based on information available at the time of publishing.  We 
>> believe that the information in this communication is correct and any 
>> opinions, conclusions or recommendations are reasonably held or made as at 
>> the time of its compilation, but no warranty is made as to accuracy, 
>> reliability or completeness.  To the extent permitted by law, neither 
>> Commonwealth Bank nor any of its subsidiaries accept liability to any person 
>> for loss or damage arising from the use of this communication. This 
>> communication does not purport to be a complete statement or summary.
>> The information provided has been prepared without considering your 
>> objectives, financial situation or needs, and before acting on the 
>> information, you should consider its appropriateness to your circumstances. 
>> No person should act on the basis of this report without considering and if 
>> necessary taking appropriate professional advice upon their own particular 
>> circumstances.
>> Commonwealth Bank of Australia, as a provider of investment, borrowing and 
>> other financial services undertakes financial transactions with many 
>> corporate entities in Australia. This may include any corporate issuer 
>> referred to in this communication. Commonwealth Bank and its subsidiaries 
>> have effected or may effect transactions for their own account in any 
>> investments or related investments referred to herein. In the case of 
>> certain securities Commonwealth Bank is or may be the only market maker.
>>
>> -----Original Message-----
>> From: r-sig-finance-boun...@r-project.org 
>> [mailto:r-sig-finance-boun...@r-project.org] On Behalf Of Robert A'gata
>> Sent: Wednesday, 5 October 2011 2:41 PM
>> To: r-help@r-project.org; r-sig-fina...@stat.math.ethz.ch
>> Subject: [R-SIG-Finance] AsOf join in R
>>
>> Hi,
>>
>> I tried to google for any solution for asof join operator in R. But I
>> couldn't find one. The asof join operator AsOf(A,B) merges 2 time
>> series by looking for latest available value of B prior to each time
>> point in A. For example,
>>
>> A <- xts(c(10,15,20,25),
>> order.by=as.POSIXct(c("2011-09-01","2011-09-09","2011-09-10","2011-09-15"))
>>
>> B <- xts(c(1.1,1.5,1.3,1.7),
>> order.by=as.POSIXct(c("2011-08-31","2011-09-09","2011-09-11","2011-09-12"))
>>
>> AsOf(A,B) should return
>>
>>                    A       B
>> 2011-09-01    10     1.1
>> 2011-09-09    15     1.1     #  (because latest value B prior to
>> 2011-09-09 is 1.1)
>> 2011-09-10    20     1.5
>> 2011-09-15    25     1.7
>>
>> How do I write the above AsOf function in R? The merge function does
>> not do what I want because it will align points that have the same
>> time stamp together while what I want is actually latest value prior
>> to timestamp in A. Any example would be greatly appreciated. Thank
>> you.
>>
>> Cheers,
>>
>> Robert
>>
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>
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