[R] Finding index of specific values in a data.frame

[David Winsemius]

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?
> 
> 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 at 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