(phixonline)--> with javascript_semantics constant tcsv = """ C1,C2,C3,C4,C5 1,5,9,13,17 2,6,10,14,18 3,7,11,15,19 4,8,12,16,20 """ sequence lines = iff(platform()=JS?split(tcsv,"\n"):get_text("test.csv",GT_LF_STRIPPED)) for i=1 to length(lines) do lines[i] = split(trim(lines[i]),',') end for lines[1] = join(lines[1],',')&",SUM" for i=2 to length(lines) do sequence s = deep_copy(lines[i]), t = {} for j=1 to length(s) do t &= scanf(s[j],"%d")[1][1] end for -- s[rand(length(s))] = rand(100) -- (if you like) t &= sum(t) lines[i] = sprintf("%d,%d,%d,%d,%d,%d",t) end for lines = join(lines,'\n') if platform()!=JS then integer fn = open("out.csv","w") puts(fn,lines) close(fn) end if puts(1,lines)