Not when I click on that link. On May 13, 2018 7:37:50 AM PDT, Rui Barradas <ruipbarra...@sapo.pt> wrote: >Hello, > >I don't understand. > >It *is* the same question. Same code, same words. And same 'AKSHAY M >KULKARNI' (the OP here) and 'AKshayKulkarni' (SO). > >Exactly the same. > >Rui Barradas > >On 5/13/2018 2:07 PM, Jeff Newmiller wrote: >> I am puzzled by the use of the term "cross-posted" here... I don't >see the OP or their question or any similar words from the question >involved the the given link, though that link seems worth bringing it >to the OP's attention. >> >> But the function given in the question seems to have other problems: >> >> A) The download.file function call puts its result in a different >place than the read.csv reads data from. Unless the OP is manually >moving files around with the file browser in the background I don't >see how this would ever work. >> >> B) The file paths refer to C:/Users/user ... it would be highly >unusual for there to be such a directory on any machine, so I am >wondering how close any of this code is to what the OP actually did. >> >> C) Reading the help page for download.file, it appears to behave like >most functions in R... it does not return until the operation is >complete. That is, the premise of the question seems flawed, and a >truly reproducible example would be needed to convince me to go down >the delay rabbit hole. The OP has been around this list long enough to >know where to go to find out how to make a reproducible example. >> >> >> On May 13, 2018 1:16:47 AM PDT, Rui Barradas <ruipbarra...@sapo.pt> >wrote: >>> Hello, >>> >>> This is cross posted from StackOverflow: >>> >>> >https://stackoverflow.com/questions/50314015/is-there-any-method-to-defer-the-execution-of-code-in-r >>> >>> Cross posting is discouraged in r-help. >>> >>> Rui Barradas >>> >>> On 5/13/2018 8:59 AM, akshay kulkarni wrote: >>>> dear members, >>>> >>>> I have created the following function to read a csv file from a >given >>> URL: >>>> >>>> function(){ >>>> s <- 1; >>>> >>>> #first get the bhav copy >>>> today <- c();ty <- c();tm <- c();tmu ><- >>> c();td <- c(); >>>> >>>> # get the URL first >>>> today <- Sys.Date() >>>> ty <- format(today, format = "%Y") >>>> tm <- format(today, format = "%b") >>>> tmu <- toupper(tm) >>>> td <- format(today, format = "%d") >>>> >>>> dynamic.URL <- >>> >paste("https://www.nseindia.com/content/historical/EQUITIES/",ty,"/",tmu,"/cm",td,tmu,ty,"bhav.csv.zip";, >>> sep = "") >>>> file.string <- >>> paste("C:/Users/user/AppData/Local/Temp/cm",td,tmu,ty,"bhav.csv") >>>> >>>> download.file(dynamic.URL, >>> "C:/Users/user/Desktop/bhav.csv.zip") >>>> bhav.copy <- read.csv(file.string) >>>> return(bhav.copy) >>>> } >>>> >>>> If I run the function, immediately it says that "file.string not >>> found". But when I run it after some time(a few seconds), it >executes >>> normally. I think when `download.file` ecexecutes, it transfers >control >>> to `read.csv, `and it tries to load the file which is not yet >properly >>> saved. when I run it after some time, it tries to overwrite the >>> existing file, which it cannot, and the `read.csv`properly loads the >>> saved file.` >>>> >>>> I want the function to execute the first time I run it. Is there >any >>> way or a function to defer the action of `read.csv`until the file is >>> properly saved? Something like this: >>>> >>>> download.file(dynamic.URL, >"C:/Users/user/Desktop/bhav.csv.zip") >>>> wait...... >>>> bhav.copy <- >read.csv(file.string) >>>> >>>> Ignore the fact that the destfile in download.file is different >from >>> file.string; it is due to function of my system (windows 7). >>>> >>>> Very many thanks for your time and effort... >>>> >>>> AKSHAY M KULKARNI >>>> >>>> >>>> [[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-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. >>
-- Sent from my phone. Please excuse my brevity. ______________________________________________ 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.
