[R] Reading in and writing out one line at a time

[Jan van der Laan]

Perhaps you mean something like sapply or apply?

When d is indeed a data.frame with one column: sapply(d[,1], mash)

Regards,

Jan van der Laan



On Thu, May 20, 2010 at 12:47 AM, sedm1000 <gdoran at mit.edu> wrote:
>
> I hope that somebody can help me with this - I think very simple - issue...?
>
> I am running a package that only accepts one line at a time, but I would
> like to run this package on a dataframe of >500 lines.
>
> Dataframe "d" is a single column:
>
> APPLES
> PEARS
> AUBERGINES
> KUMQUATS
>
> I would like to read one line of my dataframe "d", individually into a new
> frame "f", then execute the program on "f" and it provides an output:
>
>>mash(f)
>
> [[1]]
> [1]  FREDBLOGGS
>
> [2]  250
>
> I would like to record this output to a two column dataframe, "r", such as:
>
> FREDBLOGGS     250
>
> and then repeat the process on the next line of dataframe "d", and so on to
> the end of dataframe "d",writing each line into "r" so that the dataframe
> "r" eventually reads:
>
> FREDBLOGGS     250
> JAMESJONES      175
> TERRYTAITE       892
> HARRYSMITH     320
>
>
> I'm afraid that I'm new to this, but think that this first step in will be
> very useful in general. Thank you kindly for any help.
> --
> View this message in context: http://r.789695.n4.nabble.com/Reading-in-and-writing-out-one-line-at-a-time-tp2223726p2223726.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.
>