Displaying 3 results from an estimated 3 matches for "tranaction".
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transaction
2011 Mar 06
1
transaction list transformation to use rpart.
...lists using the read.transaction function in
arules
from data like
Customer-ID | Item-ID
cust1 | 2
cust1 | 3
cust1 | 5
cust2 | 5
cust2 | 3
cust3 | 2
...
#read in data to a sparse binary transaction matrix
txn = read.transactions(file="tranaction_list.txt", rm.duplicates= TRUE,
format="single",sep="|",cols =c(1,2));
#tranaction matrix to matrix
a<-as(txn, "matrix")
#matrix to data.frame
b<-as.data.frame(a)
I end up with a data.frame like:
X X.1 X.2 X.3 X.4 X.5 ...
cust1 0 1 1 0...
2007 May 29
22
Rails doesn't scale because RI/transactions in app not db!!!
Not that I have your attention! :P I''ve been having a discussion with a
respected colleague here:
http://phpbuilder.com/board/showthread.php?t=10340411 (Rails vs. PHP)
He''s basically saying that Rails won''t be able to scale because
referential integrity and tranactions are done in the application rather
than the database. Please read the referenced thread for much more info.
He also says that he doesn''t think any large-scale transaction system
done using Rails exist because he hasn''t heard of them. Does anybody
know of any?
Thanks!
CSN
--
P...
2003 Dec 01
0
No subject
...t 7.0 and slackware 7.0 installations. Most
recently Slackware 8 (beta) with 2.4.5 kernel and samba 2.2.
There are usually 14 clients 11 win98, 1 winME and 2 win2K systems.
The most common problem is the client software reports database corruption
in a log file that all systems append data to on tranactions.
Sometimes we get 3-4 days clean then some days with errors 2-3 times a day.
As an experiment I switched the server to a Win2k system and went 1 month
without a single error! My employer is very pro linux and would love to see
Samba work, but is now leaning toward an MS solution.
I suspect that...