[R] Help in modifying code to extract data from url

[Bhaskar Mitra]

Thanks everyone for the feedbacks. This is really helpful.

bhaskar

On Sat, May 22, 2021 at 11:56 AM David Winsemius <dwinsemius using comcast.net>
wrote:

> Several authors hav addressed this problem with names that resemble
> "rbindfill". In my machine I find four instances:
>
> ??rbindfill
>
> Help pages:
> ffbase::ffdfrbind.fill        rbind for ffdf where missing columns are
> added if not available in one of the ffdf objects
> plyr::rbind.fill        Combine data.frames by row, filling in missing
> columns.
> plyr::rbind.fill.matrix        Bind matrices by row, and fill missing
> columns with NA.
> rockchalk::rbindFill        Stack together data frames
>
>
> --
>
> David.
>
> On 5/20/21 2:19 AM, Jim Lemon wrote:
> > Hi Bhaskar,
> > If you are using read.table or similar, see the "fill=" argument.
> >
> > Jim
> >
> > On Thu, May 20, 2021 at 9:54 AM Bhaskar Mitra <bhaskar.kolkata using gmail.com>
> wrote:
> >> Hello Everyone,
> >>
> >> I am trying to extract data from a url. The codes work well when the
> >> data structure is as follows:
> >>
> >> X Y
> >> 1 2
> >> 1 5
> >> 1 6
> >> 1 7
> >> 3 4
> >>
> >> However, the code fails when the data structure has no number
> >> under the 2nd column (shown below).I get the following error:
> >>
> >> "Error in data.frame(..., check.names = FALSE) :
> >>    arguments imply differing number of rows: 242, 241"
> >>
> >>
> >> X Y
> >> 1 2
> >> 1
> >> 1
> >> 1 7
> >> 3 4
> >>
> >> Can anyone please help me in how I can modify the codes ( shown below)
> to
> >> adjust for the above mentioned condition
> >> in the data structure.
> >>
> >> library(rjson)
> >>
> >> url <- "abcd.com"
> >> json_data <- fromJSON(file= url)
> >> d3 <- lapply(json_data[[2]], function(x) c(x["data"]))
> >> d3 <- do.call(rbind, d3)
> >> X_Dataframe = as.data.frame(unlist(d3[[1]]))
> >> b <- do.call("cbind", split(X_Dataframe, rep(c(1, 2), length.out =
> >> nrow(X_Dataframe))))
> >>
> >>
> >> regards,
> >> bhaskar
> >>
> >>          [[alternative HTML version deleted]]
> >>
> >> ______________________________________________
> >> R-help using 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 using 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.
>

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