I have a dataset with 20 columns and ~600,000 rows. Column 1 has a number from 2-19. This number tells me, for each row, which column has the applicable data. (i.e. the data that I wish to use for each individual row)
I want to create a vector that contains the data from the value in column 1. e.g. If column 1, row 1, has a value of 6, I want to obtain the value in column 6, row1. If column1, row 2, has value of 2, I want to obtain the value in column 2, row2. etc I have created a for next loop to do this, but am looking for a more efficient manner. Thanks. ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
