Hello,
I am trying to use a for loop to name objects in each iteraction. As in the
following example (which doesn't work quite well)
my_list<-c("A","B","C","D","E","F")
for(i in c(1:length(my_list))){
url<- "http://finance.yahoo.com"
doc = htmlTreeParse(url, useInternalNodes = T)
tab_nodes = xpathApply(doc, "//table[@cellpadding = '3']")
*my_list[i]*=lapply(tab_nodes, readHTMLTable) #problem is in this line
names(*my_list[i]*)=c("Ins","outs")
}
The problem is that in iteraction #1, I need the info to be stored at an
object called "A"; At iteraction #2 at object called "B"... and so on....
Any idea/help?
thank you in advance!
--
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Using a FOR LOOP to name objects
3 messages · R. Michael Weylandt, michaelyb
In short, don't -- use a named list instead. Long answer: ?assign ?get Michael
On Tue, Feb 28, 2012 at 10:40 PM, michaelyb <cel81009759 at gmail.com> wrote:
Hello,
I am trying to use a for loop to name objects in each iteraction. As in the
following example (which doesn't work quite well)
my_list<-c("A","B","C","D","E","F")
for(i in c(1:length(my_list))){
?url<- "http://finance.yahoo.com"
?doc = htmlTreeParse(url, useInternalNodes = T)
?tab_nodes = xpathApply(doc, "//table[@cellpadding = '3']")
?*my_list[i]*=lapply(tab_nodes, readHTMLTable) ? ? #problem is in this line
?names(*my_list[i]*)=c("Ins","outs")
?}
The problem is that in iteraction #1, I need the info to be stored at an
object called "A"; At iteraction #2 at object called "B"... and so on....
Any idea/help?
thank you in advance!
--
View this message in context: http://r.789695.n4.nabble.com/Using-a-FOR-LOOP-to-name-objects-tp4430454p4430454.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at r-project.org mailing list 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.
Michael - thank you so much! Just what I needed! -- View this message in context: http://r.789695.n4.nabble.com/Using-a-FOR-LOOP-to-name-objects-tp4430454p4433903.html Sent from the R help mailing list archive at Nabble.com.