[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 )

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[1] http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example

[2] http://adv-r.had.co.nz/Reproducibility.html

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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:
>I have two columns that contain numbers along with letters (as shown
>and have different lengths. Each entry in the first column is likely to
> found in the second column at most once.
>For each entry of the first column, if that entry is found in the
>column, I would like to get the corresponding index. For instance, if
>first entry of the first column is 5th entry in the second column, I
>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
>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,
>	[[alternative HTML version deleted]]
>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>PLEASE do read the posting guide
>and provide commented, minimal, self-contained, reproducible code.

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