On Jun 10, 2015, at 1:00 PM, Kevin Kowitski wrote: > Oh I see, I'm sorry I just plopped it in GitHub for ease of help, I didn't > notice I put it under coursera work. This task is not related to coursera, I > will separate it out. > > -Kevin > > Sent from my iPhone > >> On Jun 10, 2015, at 3:21 PM, David Winsemius <dwinsem...@comcast.net> wrote: >> >> >>> On Jun 10, 2015, at 9:41 AM, Kevin Kowitski wrote: >>> >>> Hey everyone, >>> >>> I am new to R and I am trying to find the index of all of the values in a >>> data.frame. I have a .csv file that outputs pass, fail, error, and >>> indeterminate readings. I have passed the data from the .csv to a >>> data.frame, have performed the proper matching criteria to generate a >>> data.frame of 0's and 1's, and am outputting the total 1's (therefore >>> matches) found. I would also like to find the index of these values so >>> that I can output a matrix containing the date and data point which has >>> produced that match. Can anyone help set me in the right direction?
If you have a data.frame of all 1's and 0's, then this should give you the row and column indices of the 1's: which(df==1, arr.ind=TRUE) Just to test my presumption that the "==" function would coerce to a matrix suitable for the array index parameter to be effective, I tried with an available dataset: iris: > str( which( iris[-5] > 3, arr.ind=TRUE) ) int [1:316, 1:2] 1 2 3 4 5 6 7 8 9 10 ... - attr(*, "dimnames")=List of 2 ..$ : NULL ..$ : chr [1:2] "row" "col" Further help will require presentation using dput of a minimal reproducible dataset to work on. Github is not a bad way to deliver this but presenting pages of code is not a good way to present a problem. -- David. >>> >>> here is a github link to the code I have already generated for more clarity >>> on the project: >>> >>> https://github.com/KevinKowitski/datasciencecoursera/blob/master/ErrorCount.R >> >> I think the coursera homework assignments are supposed to be discussed in a >> course-provided web-mediated mailing list. >> >> It's unclear from the presentation why the `which` and `%in%` do not provide >> a solution. >>> >>> Thank you, >>> Kevin >>> ______________________________________________ >>> 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. >> >> David Winsemius >> Alameda, CA, USA >> >> ______________________________________________ >> 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. David Winsemius Alameda, CA, USA ______________________________________________ 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.
