Hi I have some data with these dimensions: 5 3 100
which correspond to the x, y, and time dimensions, for a variable, p. I need the data in this format: 100 rows (1 row per time unit), and 15 values in each row. I have attempted to reshape my data >dim(data) 5 3 100 >attr(data,'dim')<-c(dim(data)[3],dim(data)[1]*dimdata[2]) So I get data with 100 rows, 15 columns. I need to use this data outside of R, and so have to save it as an ASCII file that retains the row-column structure of the data, but I do not know how to. It would be ideal if I could end up with a text file that also has an additional column that labels which time unit (1-100) the row belongs to, i.e. 1 a1,1 a1,2 ........... a1,15 2 a2,1 a2,2 ........... a2,15 3 a3,1 a3,2 ........... a3,15 4 a4,1 a4,2 ........... a4,15 . . . 99 100 Any suggestions would be appreciated. Thanks Xi -- View this message in context: http://www.nabble.com/Converting-matrices-into-row-vectors-and-saving-as-ASCII-text-tp25523562p25523562.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.