[R] comparing two strings from data
Jeff Newmiller
jdnewmil at dcn.davis.ca.us
Fri Oct 13 09:17:48 CEST 2017
data_2 <- read.csv("excel_data.csv",stringsAsFactors=FALSE)
column_1 <- data_2$data1
column_2 <- data_2$data2
result <- match( column_1, column_2 )
Please read the Posting Guide mentioned at the bottom of this and every posting, in particular about posting plain text so that what we see will be what you saw when you sent the message. You should also read about how to create reproducible examples, e.g. about using dput as mentioned in [1] and [2], and verifying the example before sending it [3].
[1] http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
[2] http://adv-r.had.co.nz/Reproducibility.html
[3] https://cran.r-project.org/web/packages/reprex/index.html (read the vignette)
--
Sent from my phone. Please excuse my brevity.
On October 12, 2017 9:25:35 PM GMT+01:00, Yasin Gocgun <yasing053 at gmail.com> wrote:
>Hi,
>
>I have two columns that contain numbers along with letters (as shown
>below)
>and have different lengths. Each entry in the first column is likely to
>be
> found in the second column at most once.
>
>For each entry of the first column, if that entry is found in the
>second
>column, I would like to get the corresponding index. For instance, if
>the
>first entry of the first column is 5th entry in the second column, I
>would
>like to keep this index 5.
>
>AST2017000005534 TUR2017000001428
>CTS2017000079930 CTS2017000071989
>CTS2017000079931 CTS2017000072015
>
>In a loop, when I use the following code to get those indices,
>
>
>data_2 = read.csv("excel_data.csv")
>column_1 = data_2$data1
>column_2 = data_2$data2
>
>match_list <- array(0,dim=c(310,1)); # 310 is the length of the first
>column
>
>for (indx in 1: 310){
> for(indx2 in 1:713){ # 713 is the length of the second column
> if(column_1[indx] == column_2[indx2] ){
> match_list[indx,1] = indx2;
> break;
> }
> }
>}
>
>
>R provides the following error:
>
>Error in Ops.factor(column_1[indx], column_2[indx2]) :
> level sets of factors are different
>
>So can someone explain me how I can resolve this issue?
>
>Thnak you,
>
>Yasin
>
> [[alternative HTML version deleted]]
>
>______________________________________________
>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.
More information about the R-help
mailing list