[R] Hadoop R integration
Hi,
I need to showcase how R and Hadoop can work together using ORCH. I have found
a sample code from the ORACLE website as follows
dfs - hdfs.attach(ontime_DB)
res - hadoop.run(
dfs,
mapper = function(key, value) {
if (key == 'SFO' !is.na(x$ARRDELAY)) {
keyval(key, value)
}
else {
NULL
}
},
reducer = function(key, values) {
for (x in values) {
sumAD - sumAD + x$ARRDELAY
count - count + 1
}
res - sumAD / count
keyval(key, res)
})
OUTPUT:
hdfs.get(res)
key val1
1 SFO 17.44828
I could not understand in this code where is ORCH acting as a connector. Even
if you can explain how ORCH acts as a connector to Hadoop with another example
it would also be helpful.
Regards,
Lalitha Kristipati
Associate Software Engineer
Disclaimer: This message and the information contained herein is proprietary
and confidential and subject to the Tech Mahindra policy statement, you may
review the policy at http://www.techmahindra.com/Disclaimer.html externally
http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra.
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[R] Suggest method
Hi, I want to do a use case in R language. My problem statement is to upgrade the passengers from one membership level to another membership level in airlines based on their characteristics. It is like customer profiling based on their usage characteristics. Suggest a method that intakes a large amount of data and cluster them based on their characteristics and helps in knowing the passengers who are upgraded to another level . Any help is appreciated. Regards, Lalitha Kristipati Associate Software Engineer Disclaimer: This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at http://www.techmahindra.com/Disclaimer.html externally http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Database connection query
Hi, I would like to know when to use drivers and when to use packages to connect to databases in R Regards, Lalitha Kristipati Associate Software Engineer Disclaimer: This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at http://www.techmahindra.com/Disclaimer.html externally http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] New to R
Hi, In our data we have 10 people with 10 different attributes , we want to rank the people based on the weightage of these attributes. Suggest the best statistical method to do this. Does Revolution R solves my problem?? Regards, Lalitha Kristipati Associate Software Engineer Disclaimer: This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at http://www.techmahindra.com/Disclaimer.html externally http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] New to R
Thanks Regards, Lalitha K. Associate Software Engineer 917411291011 From: Jeff Newmiller jdnew...@dcn.davis.ca.us Sent: 21 January 2015 21:34 To: Lalitha Kristipati; R-help@r-project.org Subject: Re: [R] New to R This is not really a question about R... it is a question about databases because similar divisions occur in every imperative programming language that deals with databases. ODBC is a software layer that aims to create a uniform API for the programmer among different variations of SQL databases (though it doesn't entirely succeed). RODBC gives R access to that API. You have to use OS-specific utilities outside of R to link ODBC Data Source Names to specific ODBC-to-DB drivers. The alternatives are usually much more specific to the DB back end, with potential ability to take advantage of DB- specific features, and disadvantages of being more closely tied to that particular software. There is a mailing list (R-sig-db) where you should ask more specific questions about how R deals with these non-R- specific APIs, but each of the R packages maps to much more extensive documentation about those APIs that you will need to be familiar with in order to make progress with them. --- Jeff NewmillerThe . . Go Live... DCN:jdnew...@dcn.davis.ca.usBasics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/BatteriesO.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --- Sent from my phone. Please excuse my brevity. On January 20, 2015 9:51:44 PM PST, Lalitha Kristipati lalitha.kristip...@techmahindra.com wrote: Hi, I am trying to connect R to databases. I found two ways to connect. 1.By using specific package (eg RMySQL to connect to R) 2.By using connectors and RODBC package. can any one tell me the difference between those two methods. Regards, Lalitha K. Associate Software Engineer 917411291011 Disclaimer: This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at http://www.techmahindra.com/Disclaimer.html externally http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Disclaimer: This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at http://www.techmahindra.com/Disclaimer.html externally http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra. __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] New to R
Hi, I am trying to connect R to databases. I found two ways to connect. 1.By using specific package (eg RMySQL to connect to R) 2.By using connectors and RODBC package. can any one tell me the difference between those two methods. Regards, Lalitha K. Associate Software Engineer 917411291011 Disclaimer: This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at http://www.techmahindra.com/Disclaimer.html externally http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] New to R
Hi I'm learning R language from past one month .As R is used highly for data analysis ,mining and modeling ,I want to know few real time examples in R in order to make my learning fun filled and practical .Any quick suggestions are appreciated . Regards, Lalitha Kristipati Associate Software Engineer Disclaimer: This message and the information contained herein is proprietary and confidential and subject to the Tech Mahindra policy statement, you may review the policy at http://www.techmahindra.com/Disclaimer.html externally http://tim.techmahindra.com/tim/disclaimer.html internally within TechMahindra. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
