> On Nov 3, 2016, at 9:40 AM, Roelof Wobben <r.wob...@home.nl> wrote:
>
> Hello,
>
> I want to try to get all the data of a cloumn namend "sulfate" which is not
> Na.
>
> So I did :
>
> corr <- function(directory, threshold = 0) {
>
> # lezen van alle bestanden in de directory
>
> file_list <- list.files( directory, pattern = "*.csv", full.names = TRUE)
>
> # lezen van alle bestanden in a loop
> # 1) bepalen van de complete_cases
> # 2) controleren of het hoger/lager is dan de treshold.
> # 3) als het hoger is.
> # a) lezen van de nitraat en controleren of het geen Na is
> # b) lezen van de sulfaat en controleren of het geen Na is.
> # c) als beide geen Na zijn, dan de correlatie bepalen
>
> for(file in file_list) {
> content <- read.csv(file)
> if (complete.cases(content) > 0) {
> sulfate <- which (!is.Na(content[["sulfate"]]))
> print(sulfate)
>
> }
>
> }
>
> }
>
> but now I see the above error.
>
> What did I do wrong ?
You are sending a request for academic assistance to a mailing list that
specifically describes an expectation that you will use the academic assistance
resources are your institution of higher learning. Since Coursera is a
fee-based enterprise now, I would expect that they have some sort of web-page
interface for collaborating with your coursemates.
For this and other advice about constructing non-homework questions likely to
get answers on Rhelp, you should read the Posting Guide whose link is appended
to every distributed post to Rhelp.
--
David
>
> Regards,
>
> Roelof
>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
David Winsemius
Alameda, CA, USA
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