So, I am having a tricky reference file to extract information from. The format of the file is
x 1 + 4 * 3 + 5 + 6 + 11 * 0.5 So, the elements that are not being multiplied (1, 5 and 6) and the elements before the multiplication sign (4 and 11) means actually the reference for the row in a matrix where I need to extract the element from. The numbers after the multiplication sign are regular numbers Ex: > x<-matrix(20:35) > x [,1] [1,] 20 [2,] 21 [3,] 22 [4,] 23 [5,] 24 [6,] 25 [7,] 26 [8,] 27 [9,] 28 [10,] 29 [11,] 30 [12,] 31 [13,] 32 [14,] 33 [15,] 34 [16,] 35 I would like to read the rows 1,4,5,6 and 11 and sum then. However the numbers in the elements row 4 and 11 are multiplied by 3 and 0.5 So it would be 20 + 23 * 3 + 24 + 25 + 30 * 0.5. And I have this format in different files so I can't do all by hand. Can anybody help me with a script that can differentiate this? Thanks -- View this message in context: http://r.789695.n4.nabble.com/Differenciate-numbers-from-reference-for-rows-tp3019853p3019853.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list 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.