http://r.789695.n4.nabble.com/file/n4534914/Rplot01.png I have some dataset ak[1:3,] [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [1,] 0.3211745 0.4132568 0.5649930 0.6920562 0.7760113 0.8118568 0.8609301 0.9088819 0.9326736 [2,] 0.3159234 0.4071270 0.5579212 0.6844584 0.7684690 0.8243702 0.8677043 0.8931288 0.9261926 [3,] 0.3075260 0.3993699 0.5493242 0.6765600 0.7614591 0.8127050 0.8537816 0.8884786 0.9343690 [,10] [,11] [,12] [1,] 0.9605178 1 1.003940 [2,] 0.9647617 1 1.012930 [3,] 0.9618874 1 1.007103 dim(ak[1:3,]) [1] 3 12 pre[1:3,] [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [1,] 10.34615 52.02116 146.1736 243.2864 347.4150 431.6711 521.4271 629.0045 729.9594 827.8628 [2,] 10.34615 52.02539 146.3670 244.3871 350.1785 454.6706 546.5499 638.3344 741.9849 842.5700 [3,] 10.34615 52.02754 146.4656 244.9480 351.5865 457.1768 550.1341 643.0880 748.1114 850.0670 [,11] [,12] [1,] 921.5508 956.4445 [2,] 953.9648 995.8201 [3,] 951.6384 987.9105 dim(pre) 3 12 these are only sample values but when I plot then the length is different for every single line.( please see attached figure) So I would like to normalize these values. so I should normalize values in above example. -- View this message in context: http://r.789695.n4.nabble.com/data-normalize-issue-tp4534914p4534914.html Sent from the R help mailing list archive at Nabble.com.